Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Multicenter, Randomized, Double-blind, Parallel-group, Placebo-controlled Variable Treatment Duration Study Evaluating the Efficacy and Safety of Siponimod (BAF312) in Patients With Secondary Progressive Multiple Sclerosis Followed by Extended Treatment With Open-label BAF312.
Brief Summary: Evaluate the safety and efficacy of Siponimod (BAF312) versus placebo in a variable treatment duration in patients with secondary progressive multiple sclerosis (Core Part) followed by extended treatment with open-label BAF312 to obtain data on long-term safety, tolerability and efficacy (Extension Part).


Options:
A: Key inclusion Criteria:

* Diagnosis of Multiple Sclerosis (MS) as defined by revised McDonald criteria.
* A relapsing-remitting course of disease with at least 1 documented relapse during the previous year, or 2 documented relapses during the previous 2 years, or a positive gadolinium (Gd)-enhanced MRI scan at screening (in case the first MRI scan obtained at screening is negative, a second scan may be obtained 1 month later.)
* An Expanded Disability Status Scale (EDSS) score of 0-5.0 inclusive at randomization.
* Neurologically stable with no evidence of relapse or corticosteroid treatment within 30 days prior to randomization.
* Patients who decline initiation or continuation of treatment with available disease modifying drugs for MS, for whatever reason, after having been informed about their respective benefits and possible adverse events by the investigator.

Key exclusion Criteria:

* A manifestation of another type of MS than RRMS
* History of chronic disease of the immune system other than MS
* Malignancies, diabetes, significant cardiovascular, pulmonary and hepatic diseases and conditions
* Active infections
B: Inclusion Criteria:

* Patients completed the core study BAF312A2201
* Written informed consent provided before any assessment of the extension study
* Female patients at risk of becoming pregnant must have a negative pregnancy test and use simultaneously two forms of effective contraception

Exclusion Criteria:

* Newly diagnosed systemic disease other than MS (which may require immunosuppressive treatment)
* Malignancies, diabetes, significant cardiovascular and pulmonary diseases and conditions
* Active infections
C: Inclusion Criteria:

* Prior history of relapsing remitting MS
* SPMS defined as progressive increase of disability over at least 6 months
* EDSS score of 3.0 to 6.5
* No relapse of corticosteroid treatment within 3 months

Exclusion Criteria:

* Women of child bearing potential must use reliable forms of contraception.
* Diagnosis of Macular edema during screening period
* Any medically unstable condition determined by investigator.
* Unable to undergo MRI scans
* Hypersensitivity to any study drugs or drugs of similar class
D: Inclusion Criteria:

* Participants enrolled in the multicenter, randomized, double-blind, parallel-group, placebo-controlled, variable treatment duration study comparing the efficacy and safety of BAF312 to placebo in patients with Secondary Progressive Multiple Sclerosis (SPMS) Protocol No. CBAF312A2304 (sponsored by Novartis). Refer to ClinicalTrials.gov record NCT01665144.
* Subjects enrolled at one of the participating AMS04 study sites located in the United States.
* Subject must be able to provide written informed consent.

Exclusion Criteria:

* Subjects with severe bleeding disorders, platelet count less than (\<)50,000/microliters (μL), and/or who are currently on full anticoagulant therapy will be excluded from the optional CSF collections.

Answer: C