Aclient being treated for avoidant personality disorder must increase the number of social contacts per day. the person, at the least, must greet others with the sentence, "hello; how are you doing? " most likely, the therapist has which theoretical background?
psychodynamic
cognitive
behavioral
sociocultural

I believe that given the conditions of the treatment being mentioned by the question itself, the best answer to it would be: Behavioral.

Explanation:

Avoidant personality disorder is one of the conditions that have been grouped within the larger anxious personality disorders´ category. In essence, this particular condition is described as the anxiety, fear and nervousness, as well as poor self-perception that a person may have, especially when it comes to social interactions. The person sees him/herself so poorly, and develops such levels of fear, and anxiety, towards the possibility of rejection and humiliation, that they prefer to isolate themselves. The problem with it is that commonly, it is not diagnosed until after the age of 18, and a lot of people live with the disorder too long before getting treatment. This means that dealing with it is tough, as it requires a complete readjustment in the way people think and act. This is why, the best course of treatment for people with this disorder is Psycotherapy, including behavioral and cognitive therapies. However, given the approach the therapist has taken in this case, what this person is attempting is to change the person´s behavior, and make them fight against their condition by taking small steps in re-wiring their behavior socially. This is common of behavioral therapy.