What Differentiates Motivational Interviewing from Person-Centered Therapy

What differentiates motivational interviewing from person-centered therapy?

A) Motivational interviewing has specific goals of reducing ambivalence about change and increasing intrinsic motivation to bring changes about, while traditional person-centered therapy does not.
B) Motivational interviewing focuses on unconscious motives, while traditional person-centered therapy focuses on the self.
C) Motivational interviewing allows the client to talk about anything he or she wishes, while traditional person-centered therapy is more direct.
D) Motivational interviewing is a behavioral therapeutic technique, while person-centered therapy is a biomedical therapy.