The treatment team discusses the plan of care for a patient diagnosed with schizophrenia and daily cannabis abuse who is having increased hallucinations and delusions. To plan effective treatment, the team should

A) provide long-term care for the patient in a residential facility.
B) withdraw the patient from cannabis, then treat the schizophrenia.
C) consider each diagnosis primary and provide simultaneous treatment.
D) first treat the schizophrenia, then establish goals for substance abuse treatment.