A health care provider prescribes disulfiram (Antabuse) for a client with alcoholism. The drug causes severe vomiting if a person drinks alcohol while taking the drug. Why might this treatment be effective in preventing alcohol use even after the client stops taking the drug?

A) The drug eliminates the biological urge to drink alcohol.
B) The drug addresses (corrects) the underlying biological reasons for alcohol abuse.
C) The client is operantly conditioned to associate sobriety with happiness.
D) The client is classically conditioned to associate drinking with the negative experience of vomiting.