Jeremy and Julius Met When They Were Clients of the Same

Jeremy and Julius met when they were clients of the same therapist,Dr.Miller.Jeremy,who had a diagnosis of depression,was surprised to hear that Julius,whose diagnosis was for panic disorder,was getting the very same treatment as he was from Dr.Miller.According to Barlow (2004) ,why might this be a problem?

A) Treatments require randomized clinical trials to be effective.
B) Clients should not discuss their treatments with each other.
C) Treatments should vary according to the particular disorder and the client's symptoms.
D) Psychotropic drugs should always be a part of any therapeutic intervention.