Which of the Following Statements About Evaluating the Effectiveness of Psychotherapy

Which of the following statements about evaluating the effectiveness of psychotherapy is FALSE?

A) The vast majority of people who experience the symptoms of a psychological disorder seek the help of a mental health professional.
B) The term spontaneous remission refers to the improvement of symptoms that sometimes occurs simply over the passage of time.
C) In recent years, hundreds of studies have evaluated the effectiveness of the major forms of psychotherapy.
D) Research studies that evaluate the effectiveness of psychotherapy often vary in terms of which types of psychotherapy are compared, which psychological disorders are studied, and how improvement is measured.