Please select the eligibility criteria that correspond to the clinical trial below.
Title: Smoking Cessation Self-Help for Dual Users of Tobacco Cigarettes and E-Cigarettes
Brief Summary: The purpose of this study is to develop and test a series of booklets designed to assist smokers of tobacco cigarettes who are also using e-cigarettes (dual users) in quitting smoking and remaining smoke-free.


Options:
A: Inclusion Criteria:

* Daily smokers (5≥ cigarettes/day)
* A low socio-economic position (meaning being unemployed or being a recipient of one of the state programs for low income individuals)
* Being available for at least 4 appointments over a 6 month period
* Affiliation to or benefiting from social security or state medical support

Exclusion Criteria:

* Individuals who do not speak French, or who have cognitive impairments making it impossible to understand study information or a condition that makes it impossible for them to give informed consent.
* Major citizens protected by law, adults unable to express their consent and subject to a protective measure (guardianship, curatorship, safeguard of justice)
* Pregnant women or with a pregnancy project, mothers breastfeeding their child(ren).
* Regular smokers who vape daily (at least once a day).
* People who at the time of inclusion are already being managed for smoking cessation (whatever treatment: varenicline, electronic cigarette, NRT, hypnosis, acupuncture, psychotherapy, talk groups, etc.).
* Patients who are already participating in another clinical study (self-reported).
B: Inclusion Criteria:

Subjects must meet all of the following inclusion criteria to be eligible for enrolment into the study:

1. Able to comply with the study procedures
2. Male or female healthy smokers aged ≥19
3. Smoking at least 10 cigarettes a day
4. Smoking for at least one year
5. Not currently attempting to quit smoking or wishing to do so in the next 30 days (this will be verified at screening by the answer ''NO'' to both questions ''Do you intend to quit in the next 30 days?'' and ''Are you interested in taking part in one of our smoking cessation programs?'')
6. Female smokers not planning to become pregnant are using an acceptable form of contraception.

Exclusion Criteria:

The presence of any of the following will exclude a subject from study enrolment:

1. Use of smokeless tobacco, or any other tobacco products (including e-cigarettes, cigars, chewing tobacco, snus, etc.) within the last 3 months, at baseline and during the whole study.
2. Use of nicotine replacement therapy or other smoking cessation therapies within the last 3 months and at baseline.
3. Self-reported pregnancy, planned pregnancy or breastfeeding.
4. Tobacco industry employees and 1st degree relatives will be excluded in order to safeguard independence of the study

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C: Inclusion Criteria:

* Study I - First Phase - No Longer Recruiting

  * Greater than 1 year history of daily smoking
  * 1 month or more of e-cigarette use
  * Able to speak and read English
  * (1) current dual users (of tobacco cigarettes and e-cigarettes) without interest in quitting smoking; (2) current dual users who have attempted, but not quit smoking; (3) current e-cigarette users who have successfully quit smoking; and (4) former dual users who have quit both products.
* Study I - Second Phase - No Longer Recruiting

  * Current dual users (of tobacco cigarettes and e-cigarettes)
  * Smoking at least one cigarette per day over the past year
  * Using e-cigarettes at least once per week over the past month
  * Not currently enrolled in a face-to-face smoking cessation program
  * Able to speak and read English
* Study II - No Longer Recruiting

  * Current dual users (of tobacco cigarettes and e-cigarettes)
  * Smoking at least one cigarette per week over the past year
  * Using e-cigarettes at least once per week over the past month
  * Not currently enrolled in a face-to-face smoking cessation program
  * Able to speak and read English
D: Inclusion Criteria:

* Active conventional cigarette smoker

Exclusion Criteria:

* Health condition adversely affected by smoking, history or presence of cardiovascular disease

Answer: C