Why Has Behavior Therapy Had Only Limited Success in Treating

Why has behavior therapy had only limited success in treating such disorders as substance-related disorders and personality disorders?

A) These problems are highly resistant to change because of the habit-forming nature of drugs and the pervasiveness of personality disorders.
B) Behavioral therapists recognize the limitations of behavioral therapy with these problems and have not historically treated such clients.
C) Most third party payers providing services to substance addicted clients do not support behavioral therapy as a valid intervention.
D) Other therapies, such as psychoanalysis, have been treating these problems so much longer than behavioral therapists and therefore have the client base for the research needed.
E) Many of these disorders require medication and behavioral therapists do not support psychotropic drugs.