Based on Research by Smith and Glass (1977) and Others

Based on research by Smith and Glass (1977) and others, the "Dodo bird effect" has come to be known as which of the following?

A) Different therapists' theoretical orientations and different techniques do not produce different results in a counseling situation.
B) Drilling a small hole in the client's temple on each side of the skull and inserting a dull knife, making the shape of a large bird.
C) Taking a client's biological and spiritual condition into account during therapy.
D) Only b and c.
E) None of the above