Aryn Is in Therapy for Depression, When Her Therapist Begins

Aryn is in therapy for depression, when her therapist begins to suspect she may have a dissociative disorder. Why might the therapist have trouble assessing for a dissociative disorder using an interview?

A) Aryn's other identities probably have exceptional memory for events, but Aryn will not.
B) Aryn probably won't want to continue therapy.
C) Aryn's other identities may not make themselves accessible during an interview.
D) Aryn probably will try to integrate her identities before the interview takes place.