Two weeks after beginning treatment for smoking cessation, Joe visits a physician and complains of having suicidal tendencies and feeling mentally depressed. Which of the following is a most likely reason for this occurrence?
A. Joe is consuming tobacco to overcome the effects of nicotine withdrawal.
B. The treatment for Joe's condition involves a drug preparation known as varenicline.
C. The acetylcholine in Joe's body is at toxic levels, impairing his neuromuscular function.
D. Joe is not taking his medication regularly and has reverted to smoking to satisfy his craving for nicotine.
Answer: B
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