Which of the Following Is True

Which of the following is true?

A) Cognitive therapy has shown no effectiveness in treating depression in the elderly.
B) Antidepressants and some form of psychotherapy can be more efficacious than either treatment alone, especially for chronic depression.
C) Cognitive-behaviour therapy has not been shown to be effective in treating anxiety disorders in children.
D) Cognitive-behavioural therapy and interpersonal psychotherapy have both proven ineffective in treating bulimia.
E) In searching for the active ingredient of cognitive therapy for depression researchers examined three treatments which were each found to significantly differ from the other two.