If therapy clients repeatedly imbibe an alcoholic drink mixed with a nausea-producing drug,an alcoholic drink without the drug is likely to become a(n) ________ for feelings of nausea.

A) US
B) UR
C) CS
D) CR

The alcoholic drink mixed with the nausea-producing drug becomes associated with feelings of nausea, making it a conditioned stimulus (CS). The client's eventual response of feeling nauseous upon seeing or drinking the alcoholic drink without the drug is the conditioned response (CR). The unconditioned stimulus (US) is the nausea-producing drug, which naturally induces feelings of nausea (unconditioned response or UR).