Which of the Following Statements Best Summarizes the Medical-Psychobiologic Position

Which of the following statements best summarizes the medical-psychobiologic position on mental disorders?

A) Mental disorders rarely respond to physical or somatic treatments without careful monitoring of progress by clinicians in medical settings.
B) Mental illnesses with an organic cause have an unpredictable course and poor prognosis.
C) Factors related to mental disorders can include excesses or deficiencies of brain neurotransmitters as well as alterations in biologic rhythms, including the sleep-wake cycle and genetic predispositions.
D) Biological interventions such as hormones, diet, and medications must be changed frequently as they are only effective for short periods of time.