With Respect to the Effectiveness of Psychological Therapy, Which of the Following

With respect to the effectiveness of psychological therapy, which of the following alternatives is most accurate

A) Psychological therapy seems to be only minimally effective.
B) Psychological therapy seems to be effective.Much of the benefit is determined by the theoretical orientation of the therapist.
C) Psychological therapy seems to be effective.Much of the benefit of therapy, though, seems to reflect the effect of natural improvement.
D) Psychological therapy seems to be effective.Much of the benefit of therapy, though, seems to reflect nonspecific treatment effects.