Every Time Leo Opens His Cigarette Case or Uses His

Multiple Choice

Every time Leo opens his cigarette case or uses his lighter, he gets a painful electric shock. Leo's friends and family have been asked not to give him any cigarettes or light any cigarettes for him, so he must use his own lighter if he wants to smoke. Eventually, Leo loses his desire to smoke, thanks to __________.

A) negative transference
B) behavioral contracting
C) systematic desensitization
D) aversion conditioning