Freddy Is Obsessed with Cleanliness And, as a Result, Compulsively

Multiple Choice

Freddy is obsessed with cleanliness and, as a result, compulsively changes his "dirty" shirts up to twenty three times every day. He is working with a therapist who is helping him resist changing shirts. He is gradually starting to wear his shirts for progressively longer periods of time. The type of therapy he is engaged in is __________

A) aversion therapy.
B) modeling.
C) response prevention.
D) systematic desensitization.