Don Is an Atheist Who Feels That Believing in a Deity

Don is an atheist who feels that believing in a deity of any kind is a sign of intellectual weakness and needs to be removed from mental health practice. Karen and Curt come to him for marital counseling, and they are both evangelical Christians. To Karen and Curt, their problems cannot be addressed outside of understanding them in their religious context. Don, however, sees the religious context as the problem. Even if Don is an outstanding therapist, he may find it hard to counsel Karen and Curt successfully because of which limitation to therapy's effectiveness?

A) Karen and Curt's overcommitment to their religious beliefs
B) Don's overspecialiation as a researcher
C) managed care
D) client-therapist differences