The correct answer is D. A celebrity role model who promotes drugs
Explanation:
Self-confidence refers to positive ideas about the abilities we have in certain areas or to achieve goals, as well as trust in own decisions and actions. This means if Kirk lacks self-confidence he does not believe in himself and this makes him vulnerable to follow the crowd instead of making own decisions. This implies if some of his friends, relatives or someone he knows encourages Kirk to use drugs he is likely to accept.
According to this, the influence that could cause Kirk to turn to tobacco and other drugs is "A celebrity role model who promotes drugs" because due to his lack of self-confidence and the celebrity being a role model Kirk would probably try to follow his or her actions and therefore he might try drugs.
