In a Randomized Controlled Trial Comparing Kernberg's Transference-Focused Psychotherapy,dialectical Behavior

In a randomized controlled trial comparing Kernberg's transference-focused psychotherapy,dialectical behavior therapy,and supportive therapy for patients with borderline personality disorder,results indicated that patients in:

A) dialectical behavior therapy were more improved than those in transference-focused psychotherapy or supportive therapy.
B) transference-focused therapy were more improved than those in dialectical behavior or supportive therapy.
C) both dialectical behavior or transference-focused therapy improved to the same degree but were more improved than those in supportive therapy.
D) each of the three therapies improved to an equivalent degree.