Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Twelve-Week, Double-Blind, Placebo-Controlled, Randomized, Multicenter Study With Follow-up Evaluating the Safety and Efficacy of Varenicline Tartrate ( CP-526,555) in Comparison to Zyban for Smoking Cessation
Brief Summary: The primary purpose of this study is to evaluate the safety and efficacy of varenicline given for a twelve week treatment period in comparison with placebo and Zyban for smoking cessation.


Options:
A: Inclusion Criteria:

* 18 years of age or older;
* Report smoking at least 5 cigarettes per day for the previous 6 months;
* Able to read and write English;
* Agree to attend visits, to respond to coaching calls, and to respond to Interactive Voice Response (IVR) phone prompts;
* Plans to remain in the intervention catchment area for at least 12 months;
* Currently interested in quitting smoking (defined as would like to try to quit in the next 30 days).
* All women of childbearing potential will be required to agree to use an acceptable method of birth control to prevent pregnancy during the study.

Exclusion Criteria:

* Currently taking bupropion, Wellbutrin, chantix or varenicline (current use of NRT is not exclusionary if the participant agrees to use only study medication for the duration of the study);
* Study candidate is pregnant, trying to get pregnant, or nursing.
* A history of psychosis or bipolar disorder
* A history of skin or allergic reactions while using a nicotine patch.
* Had a heart attack, stroke, or abnormal electrocardiogram within the past 4 weeks.
B: Inclusion Criteria:

* An invited member of Group Health, a health care system in the Pacific Northwest
* Plan to remain enrolled in Group Health for the next 6 months
* aged 18 - 65
* Eligible for smoking cessation treatment through Group Health insurance coverage
* smoke \>= 10 cigs a day
* speak and read in English
* willing to use varenicline and no contraindications for this medication
* ready to quit smoking
* have a smart phone with internet access
* willing to receive study texts and emails
* receive care at a Group Health clinic and have electronic medical records in this system
* fill prescriptions through the Group Health pharmacy
* agree to use birth control while taking study medication, if there is a risk of pregnancy

Exclusion Criteria:

* lifetime history of dementia
* psychosis or bipolar disorder based on self-report or medical record review
* hearing, comprehension or visual limitations that preclude full study participation
* current use of other forms of tobacco
* any medical contraindication for varenicline use
* documented history of suicidal ideation/intent
C: Inclusion Criteria:

* Subjects must have smoked an average of at least 10 cigarettes per day during the past year and over the month prior to the screening visit, with no period of abstinence greater than 3 months in the past year.

Exclusion Criteria:

* Subjects who have used bupropion (Zyban, or Wellbutrin) previously.
D: Inclusion Criteria:

* Subjects must have smoked an average of at least 10 cigarettes per day during the past year and over the month prior to the screening visit, with no period of abstinence greater than 3 months in the past year.

Exclusion Criteria:

* Subjects who have used bupropion (Zyban or Wellbutrin) previously.

Answer: C