Critical Reasoning

Therapist: Cognitive psychotherapy focuses on
changing a patient's conscious beliefs. Thus,
cognitive psychotherapy is likely to be more
effective at helping patients overcome
psychological problems than are forms of
psychotherapy that focus on changing
unconscious beliefs and desires, since only
conscious beliefs are under the patient's direct
conscious control.
Which one of the following, if true, would most
strengthen the therapist's argument?
(A) Psychological problems are frequently caused
by unconscious beliefs that could be changed
with the aid of psychotherapy.
(B) It is difficult for any form of psychotherapy to
be effective without focusing on mental states
that are under the patient's direct conscious
control.
(C) Cognitive psychotherapy is the only form of
psychotherapy that focuses primarily on
changing the patient's conscious beliefs.
(D) No form of psychotherapy that focuses on
changing the patient's unconscious beliefs and
desires can be effective unless it also helps
change beliefs that are under the patient's
direct conscious control.
(E) All of a patient's conscious beliefs are under the
patient's conscious control, but other
psychological states cannot be controlled
effectively without the aid of psychotherapy