Henry, a heavy smoker, is interested in quitting. Given what you know about the cognitive processes involved in classical conditioning, what is the most likely reason he still has trouble quitting after he is treated with a drug that induces nausea when he smokes a cigarette
He realizes his nausea is due to the drug, not simply the cigarette.

He realizes his nausea is due to the drug, not simply the cigarette

Explanation:

Henry, a heavy smoker, is interested in quitting. Given what you know about the cognitive processes involved in classical conditioning, what is the most likely reason he still has trouble quitting after he is treated with a drug that induces nausea when he smokes a cigarette ,he realizes his nausea is due to the drug, not simply the cigarette.

Most heavy smoker have a frightening experience immediately after they started to rehabilitate, their  frightening experience may be aroused when they are contorted with quitting.

Henry realizes his nausea is due to the drug, not simply the cigarette because as he undergoes treatment, the drug started to make him nauseous; the drug is the conditional stimulus

i r r e l e v a n t

is there a year set? the question is incomplete