Please select the eligibility criteria that correspond to the clinical trial below.
Title: A 12-Week, Randomized, Double-Blind, Placebo-Controlled, Multicenter Trial With 40-Week Follow-Up Evaluating The Safety And Efficacy Of Varenicline Tartrate For Smoking Cessation In Patients With Mild-To-Moderate Chronic Obstructive Pulmonary Disease
Brief Summary: This study is to be conducted in subjects with mild-to-moderate COPD who are cigarette smokers with the intent of demonstrating differences in smoking cessation between varenicline and placebo.


Options:
A: Inclusion Criteria:

* Subjects will be current cigarette smokers who have smoked an average of at least 10 cigarettes per day during the past year and during the month prior to the screening visit.
* mild to moderate COPD confirmed by spirometry
* Subjects must have a clinical diagnosis of COPD.

Exclusion Criteria:

* Subjects who have made a serious attempt to quit smoking in the past 3 months.
* Subjects who have been previously randomized in a study that has included varenicline.
B: Inclusion Criteria:

* Diagnosis of Schizophrenia, Schizoaffective Disorder, or Bipolar Disorder
* Enrolled in services at the research site for a minimum of 3 months
* Regular smoker (approximately 10 cigarettes for the past 5 years) with a history of at least 1 quit attempt
* Fluent in English

Exclusion Criteria:

* Regular use of e-cigarettes in the past month
* Current interest/plan to quit smoking
* Regular use of nicotine replacement therapy to quit smoking or use of bupropion or varenicline to quit smoking
* Use of emergency room or hospitalization for psychiatric reasons in the past 30 days
C: Inclusion Criteria:

* Smoke and want to quit in the next three months
* Reside in New Zealand
* At least 18 years of age
* Able to provide verbal consent
* Have access to telephone (mobile and/or landline)
* Are prepared to use a nicotine patch or a nicotine patch and e-cigarette together.
* Only one person per household is eligible.

Exclusion Criteria:

* Pregnant women
* Women who are breastfeeding
* Current users of NRT products
* People currently enrolled in another smoking cessation programme or other cessation study
* People who have used an e-cigarette for more than one week in the last year for smoking cessation
* Current users of non-nicotine based cessation therapies (e.g. buproprion, clonidine, nortriptyline or varenicline).
* People who have had a heart attack, stroke or severe angina within the previous two weeks.
* People who self-report a history of severe allergies and/or poorly controlled asthma.
D: Inclusion Criteria:

* Males and females between 18 and 55 years old will be eligible for this study. Females must not be pregnant as determined by pregnancy screening, nor breast feeding, and must be using acceptable birth control methods during study participation.
* Current opioid dependence as evidenced by documentation of prior treatment for opioid dependence or signs of withdrawal, self-reported history of opioid dependence for consecutive 12 month period and a positive urine for opiates.
* Subjects must fulfill Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for opioid dependence.
* Subjects must have a history of cocaine use, with a reported street cocaine use of a minimum of 1/2 gram during the preceding 30 days.
* Subjects must meet DSM-IV criteria for cocaine dependence or abuse, and have laboratory confirmation of recent cocaine use (positive urine for cocaine) during the month prior to study entry.
* Subjects must be treatment-seekers for opioid and cocaine use.
* Subjects must have smoked at least 10 cigarette per day for at least one year. Varenicline's safety has only been studied in smokers.

Exclusion Criteria:

* History of heart disease, left ventricular hypertrophy, ischemic ECG changes, chest pain, arrhythmia, hypertension.
* History of severe renal or hepatic diseases.
* History of psychosis, schizophrenia, bipolar or major depressive disorder.
* History of seizure disorder.
* Current diagnosis of alcohol, benzodiazepine and other drug abuse or dependence (other than opiates, cocaine, and nicotine).
* Current use of over-the-counter or prescription psychoactive drugs (antidepressant, anxiolytics, antipsychotics, mood stabilizers, psychostimulants).
* Liver function tests (ALT or AST) greater than 3 times normal.
* Known allergy to varenicline or methadone.

Answer: A