Regarding the Effectiveness of Therapy, Which of the Following Statements

Regarding the effectiveness of therapy, which of the following statements is FALSE?

A) In a national survey, it was found that only five out of ten people who have sought mental health care say their lives improved as a result of the treatment.
B) Someone who feels better after six months of therapy may have experienced a spontaneous remission.
C) Studies have shown that some therapies are more effective for specific disorders.
D) When experiments are used to determine the effectiveness of therapies, a waiting-list control group is often used.