Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Multi-center Double-blind Parallel-group Placebo-controlled Study of the Efficacy and Safety of Teriflunomide in Patients With Relapsing Multiple Sclerosis
Brief Summary: The primary objective of the study was to assess the effect of two doses of teriflunomide, in comparison to placebo, on the frequency of multiple sclerosis (MS) relapses in participants with relapsing MS.

Key secondary objective was to assess the effect of the two doses of teriflunomide, in comparison to placebo, on disability progression.

Other secondary objectives were:

* To assess the effect of the two doses of teriflunomide in comparison to placebo on:

  * Fatigue;
  * Health-related quality of life, a measure of the impact of the participant's health on his or her overall well being.
* To evaluate the safety and tolerability of teriflunomide.


Options:
A: Inclusion Criteria:

General

1. sign written informed consent prior to participating in the study
2. 25 through 65 years of age inclusive
3. females of childbearing potential must:

   * have a negative pregnancy test at Baseline (prior to randomization) and
   * use simultaneously two forms of effective contraception during the treatment and 3-months after discontinuation of study medication

Primary Progressive Multiple sclerosis.

1. diagnosis of primary progressive multiple sclerosis (according to the 2005 Revised McDonald criteria):
2. time since first reported symptoms between 2 and 10 years
3. evidence of clinical disability progression in the 2 years prior to Screening
4. disability status at Screening

   * EDSS score of 3.5-6.0 inclusive
   * pyramidal functional system score of 2 or more
   * 25'TWT less than 30 seconds

Extension study Inclusion criteria

* Patients initially randomized to fingolimod 1.25 mg or placebo as part of the first study cohort, were to have completed at least 3 years on study drug treatment at the time of extension study initiation.
* Patients initially randomized to fingolimod 0.5 mg or placebo as part of the second study cohort, were to have continued on study drug treatment until such time as the last ongoing patient enrolled in the study had reached 3 years in study

Exclusion Criteria:

PPMS specific:

* History of relapses/attacks
* Progressive neurological disorder other than PPMS
* Pure cerebellar syndrome or pure visual progressive syndrome or pure
* cognitive progressive syndrome
* Presence of spinal cord compression at screening MRI
* Relevant history of vitamin B12 deficit
* Evidence of syphilis or borreliosis at Screening

Cardiovascular conditions:

* Myocardial infarction within the past 6 months or current unstable ischemic heart disease
* History of angina pectoris due to coronary spasm or history of Raynaud's phenomenon
* Severe cardiac failure or cardiac arrest
* History of symptomatic bradycardia
* Resting pulse \<55 bpm pre-dose
* History of sick sinus syndrome or sino-atrial heart block
* History or presence of second and third degree AV block or an increase QT interval (QTc\>440 ms)
* Arrythmia requiring treatment with class III antiarrythmic drugs
* History of positive tilt test from workout of vasovagal syncope
* Hypertension, not controlled with medication

Pulmonary:

* Severe respiratory disease or pulmonary fibrosis
* TB
* Abnormal X-ray, suggestive of active pulmonary disease
* Abnormal PFT: \<70% of predicted for FEV1 and FVC; \<60% for DLCO
* Patients receiving chronic (daily) therapies for asthma

Hepatic:

* Known history of alcohol abuse, chronic liver or biliary disease
* Total or conjugated Brb \>ULN, unless in context of Gilbert's syndrome
* AP \>1.5xULN; ALT/AST \>2xULN; GGT\>3xULN

Other:

* History of chronic disease of the immune system other than MS
* Malignancy (other than successfully treated SCC or BCC)
* Diabetes Mellitus
* Macular Edema present at screening
* HIV, Hepatitis C or B, other active infection
* History of total lymphoid irradiation or bone marrow transplantation
* Serum creatinine \>1.7 mg/dl
* WBC \<3500 cells/mm3
* Lymphocyte count \<800 cells/mm3
* History of substance abuse or any other factor that may interfere with subject ability to cooperate and comply with the study procedures
* Unable to undergo MRI scans
* Participation in any therapeutical clinical research study in the 6 months prior to randomization
* Pregnant or lactating women
* Drugs requiring wash-out period:

  3 months:
  * Systemic corticosteroids or ACTH
  * INF-beta

    6 months:
  * Immunosuppressive medication
  * Immunoglobulins
  * Monoclonal antibodies
* Drugs that exclude participation in the study:
* Cladribine
* Cyclophosphamide
* Mitoxantrone (except: patients who received a cumulative dose of no more than 60mg/m2 more than 5 years ago could enter the study)

Extension study Exclusion criteria

-Patients were not eligible for enrollment in the extension study if they had any of the following key exclusion criteria at the extension study Baseline visit: active chronic immune system disease other than MS (or stable disease treated with immune therapy); known immunodeficiency syndrome; active infection; uncontrolled diabetes mellitus; macularedema; treatment with Class Ia or III antiarrhythmic drugs; any of the specified cardiac, pulmonary, or hepatic conditions; or any medically unstable condition
B: Inclusion criteria:

* Written informed consent must be obtained before any assessment is performed
* Male and female patients 18 to 65 years of age, inclusive.
* Patients with RRMS, as defined by 2010 revised McDonald criteria.
* Patients must be neurologically stable with no onset of relapse within 30 days of randomization
* Patients with at least 1 documented relapse during the previous year or 2 documented relapses during the previous 2 years before randomization.
* Patients with an EDSS score of 0 to 6, inclusive, at Screening. A score of 6.0 indicates unilateral assistance (cane or crutch) required to walk at least 100 meters with or without resting.

Exclusion criteria:

* Patients with a history of malignancy of any organ system (other than cutaneous basal cell carcinoma) in the last 5 years that do not have confirmation of absence of a malignancy prior to randomization
* Patients with an active chronic disease (or stable but treated with immune therapy) of the immune system other than MS (e.g., rheumatoid arthritis, scleroderma, Sjogren's syndrome, Crohn's disease, ulcerative colitis) or with a known immunodeficiency syndrome (HIV-antibody positive, AIDS, hereditary immune deficiency, drug-induced immune deficiency).
* Patients who have been treated with:
* High-dose intravenous (IV) immunoglobulin (Ig) within 4 weeks before randomization
* Immunosuppressive/chemotherapeutic medications (e.g., azathioprine, cyclophosphamide, methotrexate) within 6 months before randomization
* Natalizumab within 2 months before randomization
* Previous treatment with lymphocyte-depleting therapies (e.g., rituximab, alemtuzumab, ofatumumab, ocrelizumab, or cladribine) within 1 year before randomization Previous treatment with mitoxantrone within 6 months before randomization
* Use of teriflunomide within 3.5 months prior to randomization, except if active washout (with either cholestyramine or activated charcoal) was done. In that case, plasma levels are required to be measured and be below 0.02 mg/L before randomization.

No washout period is necessary for patients treated with dimethyl fumarate, interferon (IFN) beta, or glatiramer acetate.

Patients being treated with dimethyl fumarate, glatiramer acetate, or IFN beta at the Screening visit can continue drug intake up to the day before Day 1 of this study (i.e., there is no need for a washout period).

* Patients who have been treated with systemic corticosteroids or adrenocorticotropic hormones in the past 30 days prior to the screening magnetic resonance imaging (MRI) procedure.
* Patients with uncontrolled diabetes mellitus (glycosylated hemoglobin \>9%) or with diabetic neuropathy.
* Patients with a diagnosis of macular edema during Screening (patients with a history of macular edema will be allowed to enter the study provided that they do not have macular edema at Screening).
* Patients with severe active bacterial, viral, or fungal infections.
* Patients without acceptable evidence of immunity to varicella zoster virus (VZV) at randomization.
* Patients who have received any live or live-attenuated vaccines (including VZV, herpes simplex, or measles) within 1 month before randomization.
* Patients who have received total lymphoid irradiation or bone marrow transplantation.
* Patients with any unstable medical/psychiatric condition, as assessed by the primary treating physician at each site.
* Patients who in the last 6 months experienced any of the following cardiovascular conditions or findings in the screening electrocardiogram (ECG): myocardial infarction, unstable angina, stroke, transient ischemic attack or decompensated heart failure requiring hospitalization or Class III/IV heart failure.
C: Inclusion Criteria:

* Relapsing multiple sclerosis,
* Two relapses in prior 2 years or one relapse in prior year.

Exclusion Criteria:

* Clinically relevant cardiovascular, hepatic, neurological, endocrine or other major systemic disease,
* Significantly impaired bone marrow function or, significant anemia, leukopenia or thrombocytopenia,
* Pregnant or nursing woman,
* Alcohol or drug abuse,
* Prior or concomitant use of cladribine, mitoxantrone, or other immunosuppressant agents such as azathioprine, cyclophosphamide, cyclosporin, methotrexate or mycophenolate,
* Human immunodeficiency virus (HIV) positive,
* Any known condition or circumstance that would prevent, in the investigator's opinion, compliance or completion of the study.

The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.
D: Inclusion Criteria:

* Participants must have a confirmed and documented multiple sclerosis (MS) diagnosis as defined by the Revised McDonald criteria, with relapse onset disease or a relapsing-remitting disease course.
* Participants must be ambulatory with Kurtzke's expanded disability status scale (EDSS) score of 0 to 5.5 in both screening and randomization visits.
* Participants must be in a stable neurological condition, relapse-free and free of any corticosteroid treatment \[intravenous (IV), intramuscular (IM) and/or per os (PO)/oral\] or adrenocorticotrophic hormone, 60 days prior to randomization.
* Participants must have experienced at least one documented relapse in the 12 months prior to randomization.
* Participants must have disease duration of not more than 15 years.
* Women of child-bearing potential (for example, women who are not postmenopausal or surgically sterilized) must practice an acceptable method of birth control for 30 days before taking the study drug and two acceptable methods of birth control during the duration of the study and until 30 days after the last dose of study medication.

  * Additional criteria apply, please contact the investigator for more information.

Exclusion Criteria:

* Participants with progressive forms of MS.
* Participants with neuromyelitis optica.
* Use of experimental or investigational drugs and/or participation in drug clinical studies within the 6 months prior to randomization.
* Use of immunosuppressive agents or cytotoxic agents, including cyclophosphamide, within 6 months prior to randomization.
* Use of either of the following within 2 years prior to randomization visit: natalizumab (Tysabri®), rituximab, ocrelizumab, atacicept, belimumab, or ofatumumab.
* Use of teriflunomide (Aubagio®) within 2 years prior to randomization, except if active washout (with either cholestyramine or activated charcoal) was done 2 months or more prior to randomization.
* Previous treatment with glatiramer acetate (Copaxone®) Interferon β (either 1a or 1b), fingolimod (Gilenya®), dimethyl fumarate (Tecfidera®) or intravenous immunoglobulins within 2 months prior to randomization.
* Chronic (more than 30 consecutive days) systemic (IV, IM or PO) corticosteroid treatment within 2 months prior to randomization.
* Previous use of mitoxantrone (Novantrone®), cladribine, or alemtuzumab (Lemtrada®).
* Previous use of laquinimod.
* Previous total body irradiation or total lymphoid irradiation.
* Previous stem cell treatment, autologous bone marrow transplantation or allogenic bone marrow transplantation.
* Use of moderate/strong inhibitors of cytochrome P450 (CYP) 3A4 within 2 weeks prior to randomization.
* Use of inducers of CYP3A4 within 2 weeks prior to randomization visit.
* Pregnancy or breastfeeding.
* A known history of sensitivity to gadolinium (Gd).
* Inability to successfully undergo magnetic resonance imaging (MRI) scanning.
* Participants who underwent endovascular treatment for chronic cerebrospinal venous insufficiency within 3 months prior to randomization.

  * Additional criteria apply, please contact the investigator for more information.

Answer: C