The Patient Is Scheduled for Surgery Late in the Afternoon

The patient is scheduled for surgery late in the afternoon.His postoperative prescriptions include patient-controlled analgesia (PCA) therapy.Which of the following nursing interventions is appropriate to perform?

A) Teach the patient about PCA after the patient comes out of recovery.
B) Teach the patient about PCA before surgery and before preoperative medication administration.
C) Tell the patient not to use PCA unless he can no longer tolerate the pain.
D) Inform the patient's family to watch him carefully and to depress the PCA administration button whenever they think he needs it.