Which Is True of Eysenck's 1952 Study on the Effectiveness

Which is true of Eysenck's 1952 study on the effectiveness of psychotherapy?

A) Roughly two-thirds of a group of neurotic patients got better due to psychotherapy.
B) Psychotherapy was shown to be better than no therapy.
C) There were methodological problems with his research.
D) Roughly two-thirds of a group of neurotic patients got better whether they were treated by means of psychotherapy or not.
E) a and b
F) c and d