After Losing His Job in a Corporate Merger, Dean Developed

After losing his job in a corporate merger, Dean developed an intense fear of crowds and crowded places. His psychologist is using systematic desensitization to help Dean overcome the fear. During the actual process of systematic desensitization, Dean:

A) becomes deeply relaxed, then imagines one of the scenes in his anxiety hierarchy.
B) must remain seated in a room while the room gradually becomes filled with people.
C) looks at photographs of crowded places, that are paired with mild electric shocks.
D) must face the members of his family, who actively confront him about the irrationality of his beliefs.