As Critical Thinking: Evaluating New Psychotherapies: the Case of EMDR

As Critical Thinking: Evaluating New Psychotherapies: The Case of EMDR points out, eye movement desensitization reprocessing highlights an ongoing problem in contemporary psychotherapy. What is that problem?

A) It is difficult for new psychotherapy approaches to gain acceptance, even when they are extremely effective in relieving the symptoms of psychological disorders.
B) Meta-analysis is not an acceptable way of evaluating the effectiveness of psychotherapy techniques.
C) New, untested psychotherapy techniques are developed, advertised, and marketed before controlled scientific studies of their effectiveness have been conducted.
D) There is currently no universally accepted standard for effectiveness that can be applied to a revolutionary new psychotherapy technique, such as eye movement desensitization reprocessing.