Answer - D - While Mark’s presentation is undoubtedly that of an OCD client; the case is unique because Mark hears voices. Obsessions, as defined by the diagnosis, must be known to come from the client’s mind. Further reality testing may be necessary to help Mark understand whether or not he can see the voices as part of his disorder. The voices also rule out PTSD or GAD as potential diagnoses since neither involves auditory hallucinations. It's likely important Mark be referred to a psychiatrist who can ensure proper treatment of the psychotic issues to make substance abuse treatment more beneficial.
