Please select the eligibility criteria that correspond to the clinical trial below.
Title: An Exploratory Phase 2a, Randomized, Double-blind, Placebo-controlled, Multicenter Study To Assess Mechanism Of Action (Moa) Of Cp-690,550 In The Skin When Administered Orally At 10 Mg Twice Daily (Bid) For 12 Weeks In Subjects With Moderate To Severe Chronic Plaque Psoriasis
Brief Summary: There are cells in the skin and blood of humans with chronic moderate to severe plaque psoriasis with specific activities that may determine the effectiveness of treatment. These activities may be described by obtaining samples of skin and blood and analyzing them using a variety of tests.


Options:
A: Inclusion Criteria:

1. Subjects must be able to understand and communicate with the investigator and comply with the requirements of the study and must give a written, signed and dated informed consent before any study related activity is performed. Where relevant, a legal representative will also sign the informed consent according to local laws and regulations.
2. Subjects who complete Week 52 of study CAIN457A2304 or complete Week 40 of study CAIN457A2307
3. Subjects expected to benefit from participation in the extension study, as assessed by the subject and investigator

Exclusion Criteria:

1. A protocol deviation in the core studies which according to the investigator will prevent the meaningful analysis of the extension study for the individual subject
2. Ongoing use of prohibited psoriasis or non-psoriasis treatments. Time period from last use of prohibited treatments in the core study to first dose of study drug in this extension study.
3. Subjects expected to be exposed to an undue safety risk if participating in the trial
4. Current severe progressive or uncontrolled disease which in the judgment of the investigator renders the subject unsuitable for the trial
5. Plans for administration of live vaccines during the study period
6. Pregnant or nursing (lactating) women, where pregnancy is defined as the state of a female after conception and until the termination of gestation, confirmed by a positive hCG laboratory test (\>10 mIU/mL).
B: Inclusion Criteria:

* Diagnosis of plaque-type psoriasis with or without psoriatic arthritis for at least 6 months prior to first administration of any study agent
* Must be a candidate for phototherapy or systemic treatment for psoriasis (either new to treatment or having had previous treatment)
* Must be considered, in the opinion of the investigator, suitable candidates for adalimumab therapy
* If a woman, she must be postmenopausal, or if premenopausal, she must be either surgically sterile, practicing a highly effective method of birth control, or not heterosexually active during the study and for 5 months after receiving the last dose of study drug
* If a man, he must agree to use a double-barrier method of birth control (or must have been surgically sterilized) and to not donate sperm during the study and for 5 months after receiving the last dose of study drug.

Exclusion Criteria:

* History of or current signs or symptoms of severe, progressive, or uncontrolled renal, hepatic, hematological, gastrointestinal, endocrine, pulmonary, cardiac, neurologic, cerebral, or psychiatric disease
* Has a contra-indication to anti-TNF therapy
* Has a history of chronic or recurrent infectious disease
* Has a nonplaque form of psoriasis or has drug-induced psoriasis
* Has been previously treated with adalimumab
* Has received any therapeutic agent directly targeted to IL-12, IL-17, or IL-23, (including but not limited to ustekinumab, briakinumab \[ABT-874\], AIN457, and SCH900222) within 6 months of the first administration of study agent.
C: Inclusion Criteria:

* Have had a diagnosis of plaque-type psoriasis (psoriasis vulgaris) for at least 12 months prior to the first screening procedure.
* Have a PASI score of 12 or greater AND a PGA score of 3 ("moderate") or 4 ("severe") at Baseline (Day 1).
* Considered by dermatologist investigator to be a candidate for systemic therapy or phototherapy of psoriasis (either naïve or history of previous treatment).

Exclusion Criteria:

* Currently have non-plaque forms of psoriasis, eg, erythrodermic, guttate, or pustular psoriasis, with the exception of nail psoriasis which is allowed.
* Have current drug induced psoriasis, eg, a new onset of psoriasis or an exacerbation of psoriasis from beta blockers, calcium channel blockers, antimalarial drugs or lithium.
* Subjects who cannot discontinue systemic therapies and/or topical therapies for the treatment of psoriasis and cannot discontinue phototherapy (UVB or PUVA) for the study are excluded.
D: Inclusion Criteria:

* Adults over 18 years of age with a diagnosis of chronic moderate to severe plaque psoriasis for at least 12 months; in generally good health; on stable dose of non-prohibited medications; able to stop current psoriasis therapy (systemic or topical) for several weeks prior to and during study participation.

Exclusion Criteria:

* Serious underlying disease including viral disorders such as hepatitis or HIV or skin condition that would interfere with skin biopsies or evaluation of psoriasis; conditions that could interfere with drug absorption after oral administration; history of malignancy or auto-immune disease.
* Use of oral or injected corticosteroids (steroids).

Answer: D