In a therapeutic setting, a client who wants to lose weight eats some favorite foods laced with a nausea-producing drug. yet, outside the therapist's office, the client knows he or she can eat those foods without fear of nausea. this awareness contributes to the limited effectiveness of

a. spontaneous recovery.
b. aversive conditioning.
c. client-centered therapy.
d. the double-blind procedure.
e. exposure therapy.