The Physician Tells the Nurse,"The Medication I'm Prescribing for the Patient

The physician tells the nurse,"The medication I'm prescribing for the patient enhances the g-aminobutyric acid (GABA) system." Which patient behavior will provide evidence that the medication therapy is successful?

A) The patient is actively involved in playing cards with other patients.
B) The patient reports that, "I don't feel as anxious as I did a couple of days ago."
C) The patient reports that both auditory and visual hallucinations have decreased.
D) The patient says that, "I am much happier than before I came to the hospital."