Last Year Becky Went to a Psychologist and Was Cured

Multiple Choice

Last year Becky went to a psychologist and was cured of her dog phobia.Today,however,while jogging in the park she was overcome with anxiety when she saw a young man jogging toward her with his golden retriever on a leash.Apparently,Becky's dog phobia

A) showed spontaneous recovery.
B) had not been extinguished after all.
C) showed higher-order conditioning.
D) showed stimulus generalization.