Jenna Is Afraid of Speaking to a Large Audience

Jenna is afraid of speaking to a large audience.Her therapist suggests that prior to a speaking engagement she should reassure herself with comments like,"Cheer up,Jenna.You know what you're talking about and your topic is really interesting!" This approach to reducing Jenna's fear most clearly illustrates

A) aversive conditioning.
B) client-centered therapy.
C) dialectical behavior therapy.
D) cognitive therapy.