During the Immediate Postoperative Period, the Post Anesthesia Care Unit

During the immediate postoperative period, the Post Anesthesia Care Unit nurse is assessing a patient who had hip surgery. The patient is experiencing tachycardia, tachypnea, and muscle rigidity, and his temperature is 103° F ( 39.4° C ) . The nurse will prepare for what immediate treatment?

A) naltrexone hydrochloride ( Narcan ) injection, an opioid reversal drug
B) dantrolene ( Dantrium ) injection, a skeletal muscle relaxant
C) An anticholinesterase drug, such as neostigmine
D) Cardiopulmonary resuscitation ( CPR ) and intubation