Gillian Has Been Diagnosed as Having Borderline Personality Disorder

Gillian has been diagnosed as having borderline personality disorder. When her therapist arrived late for an appointment, she flew into a rage at the office, claiming that he must hate her and that she wants to stop seeing him. What might be the best strategy to deal with this situation?

A) Because people with borderline personality disorder need discipline, the therapist should yell back at her and tell her how wrong she is to think this way.
B) The therapist should let her leave because she is attempting to manipulate him.
C) The therapist should ignore Gillian's outburst and the things she is saying until she calms down.
D) The therapist should explain to her in a gentle but firm manner that his tardiness is not due to anything about her.