A client is undergoing an appendectomy under general anesthesia when the client's temperature rises to 105°F (40.6°C), accompanied by increased muscle rigidity. The perioperative nurse should anticipate which intervention?
a) Administration of a bolus of 0.9% NaCl
b) Administration of propofol IV
c) Cardiopulmonary resuscitation
d) STAT administration of dantrolene