Julie Has a Fear of Riding in Elevators

Julie has a fear of riding in elevators. She is seeing a therapist who asks her to construct a hierarchy of her fears related to riding in elevators. In addition, her therapist is teaching her to relax while imagining each fear in the hierarchy. Julie's therapist is using

A) client-centered therapy.
B) rational-emotive therapy.
C) systematic desensitization.
D) cognitive consistency therapy.
E) in-vivo therapy.