Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Double-Blind, Placebo-Controlled, Sequential Ascending, Repeated-Dose Study of the Safety and Pharmacokinetics of Subcutaneous REGN668 in Patients With Moderate-to-Severe Extrinsic Atopic Dermatitis
Brief Summary: The purpose of this study is to assess the Safety and Tolerability of REGN668 (how the body reacts to the drug) compared to placebo (an inert substance) in patients with moderate-to-severe extrinsic Atopic Dermatitis.


Options:
A: The inclusion criteria included, but were not limited to, the following:

1. Chronic Atopic Dermatitis that had been present for at least 3 years
2. History of inadequate response to out-patient treatment with topical medications, or for whom topical treatments were otherwise inadvisable (e.g, because of important side effects or safety risks)
3. Willing and able to comply with all clinic visits and study-related procedures

The exclusion criteria included, but were not limited to, the following:

1. Prior treatment with dupilumab (REGN668/SAR231893)
2. Presence of certain laboratory abnormalities at the screening visit
3. Treatment with an investigational drug within 8 weeks of baseline visit
4. Treatment with a live (attenuated) vaccine within 12 weeks before the baseline visit
5. Certain other treatments and medical procedures undertaken within a particular time frame prior to the baseline visit
6. Known history of human immunodeficiency virus (HIV) infection
7. History of malignancy within 5 years before the baseline visit (with certain exceptions)
8. Planned surgical procedure during the length of the study
9. High risk of parasite infection
10. Any other medical or psychological condition that in the opinion of the investigator or the sponsor's medical monitor, would place the participants at risk, interfere with participation in the study or interfere with interpretation of study results
11. Pregnant or breast-feeding women
B: Key Inclusion Criteria:

1. Chronic AD that had been present for at least 3 years before the screening visit;
2. Documented recent history (within 6 months before the screening visit) of inadequate response to a sufficient course of out-patient treatment with topical AD medication(s).

Key Exclusion Criteria:

1. Participation in a prior Dupilumab clinical trial;
2. Important side effects of topical medication (e.g. intolerance to treatment, hypersensitivity reactions, significant skin atrophy, systemic effects), as assessed by the investigator or treating physician;
3. Having used any of the following treatments within 4 weeks before the baseline visit, or any condition that, in the opinion of the investigator, was likely to require such treatment(s) during the first 2 weeks of study treatment:

   1. Immunosuppressive/immunomodulating drugs (e.g, systemic steroids, cyclosporine, mycophenolate-mofetil, Janus kinase inhibitors, interferon-gamma \[IFN-γ\], azathioprine, methotrexate, etc.);
   2. Phototherapy for AD;
4. Treatment with a live (attenuated) vaccine within 12 weeks before the baseline visit;
5. History of human immunodeficiency virus (HIV) infection or positive HIV serology at screening;
6. Positive hepatitis B surface antigen (HBsAg), hepatitis B core antibody (HBcAb), or hepatitis C antibody at the screening visit;
7. Active or acute infection requiring systemic treatment within 2 weeks before baseline visit;
8. Known or suspected history of immunosuppression;
9. Pregnant or breastfeeding women, or planning to become pregnant or breastfeed during the participant's participation in this study.

Note: The eligibility criteria listed above is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial therefore not all inclusion/ exclusion criteria are listed.
C: Inclusion Criteria:

* Clinical diagnosis of atopic dermatitis that has been present for at least 3 years before the screening visit
* Investigator's Global Assessment (IGA) score of \>/= 3 at the screening and baseline visits
* \>/= 15% body surface area (BSA) of AD involvement at the screening and baseline visits
* History of inadequate response to a stable (\>/= 1 month) regimen of topical corticosteroids or calcineurin inhibitors as treatment for AD within 3 months before the screening visit
* Willing and able to comply with clinic visits and study-related procedures
* Patient able to read and understand, and willing to sign the informed consent form

Exclusion Criteria:

* A positive QuantiFERON® - TB (tuberculosis) Gold Test at the screening visit
* Known history of Human Immunodeficiency Virus (HIV), Hepatitis B or Hepatitis C and/or positive Hepatitis B surface antigen (HBsAg), positive Hepatitis C antibody (HCV)
* Treatment with an investigational drug within 8 weeks before the baseline visit
* Treatment with leukotriene inhibitors within 4 weeks before the baseline visit
* Treatment with systemic corticosteroids within 4 weeks before the baseline visit
* Treatment with topical corticosteroids, tacrolimus, and/or pimecrolimus within 1 week before the baseline visit
* Systemic treatment for AD with an immunosuppressive/immunomodulating substance within 4 weeks before the baseline visit
* Chronic or acute infection requiring treatment
* History of clinical parasite infection, other than treated trichomoniasis
* History of malignancy within 5 years before the baseline visit
* Any medical or psychiatric condition which, in the opinion of the investigator or the sponsor's medical monitor, would place the patient at risk, interfere with participation in the study, or interfere with the interpretation of study results
* Pregnant or breast-feeding women
* Unwilling to use adequate birth control, if of reproductive potential and sexually active
D: Inclusion Criteria:

* Physician diagnosis of atopic dermatitis for greater than (\>) 1 year
* Atopic dermatitis involvement of greater than or equal to (\>=) 10 percent (%) body surface area
* EASI score of \>= 12
* SCORAD of \>= 25
* IGA score of \>= 3
* Effective birth control in line with protocol details

Exclusion Criteria:

* History of anaphylaxis following any biologic therapy
* Hepatitis B, C or human immunodeficiency virus
* Pregnant or breastfeeding
* History of cancer
* Previous receipt of tralokinumab

Answer: C