Please select the eligibility criteria that correspond to the clinical trial below.
Title: Improving Varenicline Adherence and Outcomes in Homeless Smokers
Brief Summary: the purpose of the study is to see if varenicline in combination with motivational counseling helps homeless cigarette smokers quit smoking.


Options:
A: Inclusion Criteria:

* currently homeless
* smoke 5 or more cigarettes per day
* smoked 100 cigarettes in lifetime
* aged 18 years or older

Exclusion Criteria:

* unstable mental illness
* pregnancy
* current history of psychoactive or alcohol dependence or psychotic disorder
* cognitive impairment
B: Inclusion Criteria:

* Proficient in English, assessed with items asking about native language and self-reported comfort communicating in English among non-native speakers.
* Age ≥18 years old, assessed by self-report and verified by date of birth.
* Has smoked ≥100 cigarettes and currently smokes ≥5 cigarettes per day, verified by an exhaled carbon monoxide level of ≥8 ppm.
* Ready to try quitting smoking within the next month.
* Currently homeless, assessed by self-report and defined as usually staying in an emergency shelter, transitional shelter, abandoned building, place of business, car or other vehicle, church or mission, hotel or motel, or anywhere outside during the past 7 days. Additionally, individuals will be considered currently homeless if they usually stayed in somebody else's house, apartment/condominium, or room in the past 7 days because of not having their own place to stay.

Exclusion Criteria:

* Currently pregnant, assessed by a urine pregnancy test conducted on all premenopausal biologic females who have not had a hysterectomy, or planning to become pregnant in the next 2 months.
* Past 30-day use of nicotine replacement therapy, bupropion, or varenicline for smoking cessation, assessed by self-report. Use of bupropion for reasons other than to quit smoking (e.g. depression) is permissible.
* Prior serious adverse reaction to the nicotine patch, defined as any reaction that was life-threatening or required hospitalization.
* Heart attack or chest pain within the past 2 weeks.
* Inability to read a sentence written at a Flesch-Kincaid grade level of 4.
* Inability to provide informed consent, assessed with knowledge questions about the material presented during the informed consent process that individuals must correctly answer before providing informed consent to participate.
C: Inclusion Criteria:

* Currently Homeless
* Smoked at least 100 cigarettes in lifetime
* AUDIT score of \> or equal to 5, \< or equal to 26
* Aged 18 years or older
* Willing to attend study sessions and follow other study protocol

Exclusion Criteria:

* Use of smoking cessation medications or interventions in last 30 days
* Unstable medical illness that requires immediate medical care
* AUDIT score of \< 5 or \> 26
* Pregnancy or other Nicotine Replacement Therapy (NRT) contraindications
* Current history or in past 6 months of psychotic disorder or major depressive disorders that is not stable on treatment for past 3 months
* Cognitive impairment
D: Inclusion Criteria:

* must be a Veteran who is eligible for care within the VA system;
* must be currently homeless or have been homeless more than twice in the past year period;
* must have current smoking status of at least 10 cigarettes per day for at least 1 year (verified with breath carbon monoxidemeasurement);
* must be aged 18 to 70;
* must be English speaker

Exclusion Criteria:

* Pregnancy;
* Any substance use disorder in any of the following drug categories: opioids, cocaine, alcohol, sedatives, stimulants, hallucinogens, or drugs categorized as "other" per the Structured Clinical Interview for Diagnostic and Statistical Manual-IV.
* Urine drug screen results positive for cocaine, amphetamines, stimulants, opioids, or hallucinogens;
* Not stable on medications for the study period;
* Use of any other forms of nicotine such as cigars, pipes, or chewing tobacco;
* Participants may be excluded if they have a seizure disorder, uncontrolled diabetes or an eating disorder;
* Prior history of hepatitis or cirrhosis; current hepatitis or cirrhosis
* Score less than 80 on Kaufman Brief Intelligence Test

Answer: A