Which of the following is NOT part of Wolpe's systematic desensitization procedure?

A) learning relaxation techniques
B) exploring why the client is afraid of an object or situation
C) developing a hierarchy of fears
D) gradually confronting the hierarchy of fears

Exploring why the client is afraid of an object or situation is not a specific step in Wolpe's systematic desensitization procedure. Rather, the focus is on gradually exposing the client to the feared object or situation while using relaxation techniques to reduce anxiety. Developing a hierarchy of fears (C) is an important part of this process, as it helps to break down the feared situation into small, manageable steps that can be gradually approached. Learning relaxation techniques (A) is also essential, as these skills are used to counteract anxiety and manage physical symptoms such as muscle tension and rapid heart rate. Gradually confronting the hierarchy of fears (D) is the primary goal of the treatment, as it helps the client to develop new, positive associations with the previously feared object or situation.