Which of the Following Statements Is True Concerning Cognitive-Behavioural Therapy

Which of the following statements is true concerning cognitive-behavioural therapy and drug therapy in reducing binge eating behaviours?

A) Drug therapy has been shown to be more effective than cognitive-behavioural therapy
B) Cognitive behavioural therapy has been shown to be more effective than drug therapy
C) Cognitive behavioural therapy and drug therapy have been shown to be equally effective
D) Neither drug therapy nor cognitive-behavioural therapy have been shown to be effective