The Postoperative Patient Who Has No Previous Medical Conditions Is

The postoperative patient who has no previous medical conditions is difficult to arouse when transferred to the surgical unit from the postanesthesia care unit.The nurse monitors the pulse oximeter and gets a reading of 85%.The nurse's next action should be to:

A) Assess the pulse oximeter reading again in 1 hour.
B) Arouse the patient, have him cough, and encourage deep breathing.
C) Administer a dose of pain medication.
D) Suction fluid from the oral cavity.