Answer:
The correct answer is c. is an appropriate therapy based on extinguishing a conditioned response.
Step-by-step explanation:
In psychology, a conditioned response is a behavior triggered by a certain stimulus that is not natural, but is the product of some learning process experienced by the individual. In our case, the conditioned response is the obsessive hand-washing, while the stimuli that provoke this response is something like touching dirty doorknobs, which triggers his fear of dirt and germs. In order to make Don unlearn the conditioned response, his therapist orders Don to go around the building touching all the dirty doorknobs without washing his hands. This is an appropriate therapy based on extinguishing a conditioned response. Once Don gets over his initial fear and repulsion, he will slowly unlearn to associate the stimuli (being exposed to dirty things) with the conditioned response (washing his hands), which is a big step towards treating his obsessive-compulsive disorder.