What Is the General Message About the Effectiveness of Psychotherapy

What is the general message about the effectiveness of psychotherapy in treating one's behaviour or emotional problems?

A) Insight therapies are superior to those which do not address the underlying cause of one's problems such as behavioural and cognitive therapies.
B) Behavioural and cognitive forms of therapy are superior to those that attempt to identify the underlying causes of one's problems such as insight therapies.
C) A large portion of people improve without receiving any formal type of therapy,so psychotherapy is often unnecessary.
D) Most therapies discussed in the text are equally effective in reducing one's problems.