Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Prospective, Randomized, Double-Blind, Placebo-Controlled, Multi-Center Multinational Study Of Efficacy And Safety Of Varenicline Tartrate For Smoking Cessation
Brief Summary: To investigate safety and efficacy of varenicline tartrate in helping people quit smoking


Options:
A: Inclusion Criteria:

* Smoke at least 10 cigarettes per day for the previous 6 months - Expired CO \> 9 ppm - Motivated to quit smoking - Able to read and write English - Willing to complete required study assessments

Exclusion Criteria:

* Uncontrolled hypertension (systolic \>180mm Hg or diastolic \>110mm Hg) - History of bipolar disorder or psychosis - Myocardial infarction or other serious cardiac problem in the previous 4 weeks - History of diagnosed anorexia and/or bulimia - Diagnosis of Alcohol Dependence in the previous 6 months by participant self-report or drinking 6 or more drinks on six or more days a week - History of seizure and/or serious head injury involving loss of consciousness - Use of contraindicated medications (MAO inhibitors, bupropion, lithium, anticonvulsants, antipsychotics) - Currently pregnant or breast-feeding - Unwilling to use effective contraception during the treatment phase - More than one participant from the same household - Allergic reactions to 3 or more classes of drugs
B: Inclusion Criteria:

* Meets DSM-IV criteria for schizophrenia or schizoaffective disorder
* Receiving a stable dose of antipsychotic medication for at least 1 month prior to study entry
* Smokes at least 10 cigarettes per day
* Wishes to stop smoking
* Attended last three scheduled clinic visits, prior to study entry

Exclusion Criteria:

* Significant medical or neurologic illness
* History of severe head injury with loss of consciousness
* Treated with monoamine oxidase inhibitors or carbamazepine in the 14 days prior to study entry
* Taking clozapine at doses greater than 500 mg/d without an anticonvulsant
* Currently undergoing an acute exacerbation of psychotic symptoms
* Current or history of bulimia or anorexia
* Current excessive water intake
* Recent history of mania
* Known allergy or hypersensitivity to bupropion
* Current substance abuse other than tobacco, nicotine replacement treatment, or smokeless tobacco
* Currently receiving treatment with bupropion
* Pregnant or breastfeeding
C: Inclusion Criteria:

* Long-term, daily NRT users (except nicotine patch) (\>11 months) ex-smokers that are willing to try to stop the use of NRT and adhere to this protocol.
* More than 4 pieces of nicotine gum/ sublingual tablets/ lozenges/ per day, OR more than 3 inhaler cylinders per day, OR
* more than 10 puffs of nasal spray per day.

Exclusion Criteria:

* Age \< 18 years,
* CO Smokers,
* Pregnant and lactating women,
* Used varenicline before,
* Not able to cooperate,
* Other significant diseases that might influence the trial (such as moderate -severe cardiac disease, lung cancer,) in expired air \> 7 ppm.
D: Inclusion Criteria:

* Current cigarette smokers between the ages of 18 and 75 years, who are motivated to stop smoking

Exclusion Criteria:

* Patients currently suffering from depression, or have been diagnosed with depression in the last 12 months, or subjects with past or present history of psychosis, panic disorder, or bipolar disorder
* Any subject with known severe chronic obstructive pulmonary disease (COPD)

Answer: D