The therapist is likely to ask Gina first to imagine registering for an AP course. The Systematic Desensitization therapy consists of successive and continuous approaches of the situation and object feared by the person, these approximations are made starting by situations similar to the feared, until reaching the dreaded situation, in this case, for example, the least feared situation It is the registration for an AP course, so the therapist will initially ask you to think about it.
I hope my answer can help you.