Which of the following most accurately summarizes the results of outcome research on different forms of psychotherapy? a. various forms of psychotherapy are so radically different that it is not possible to offer definitive conclusions concerning their effectiveness. b. psychoanalytic treatment tends to be superior to other treatments because it is the only one that seeks to uncover underlying causes of disorders. c. psychotherapy is effective, and many types of psychotherapy share key "active ingredients." d. despite decades of research there is little evidence that psychotherapy is effective.

The answer is: C. Psychotherapy is effective, and many types of psychotherapy share key "active ingredients."

The 'Active ingredients' refers to the things that the therapists need to do in order to be able to fully access the victim's condition and deliver a proper judgement regarding the type of disorder that the patient is experiencing and the ways to treat it.

There are several different types of psychotherapy and each of them have their own active ingredients. But, almost all of them share several key active ingredients (such as building a rapport with the patient and trying to improve patient's awareness toward their situation.

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