In Some Genetically Susceptible Children,anesthetic Agents Can Trigger Malignant Hyperthermia

In some genetically susceptible children,anesthetic agents can trigger malignant hyperthermia.The nurse should be alert in observing that,in addition to an increased temperature,an early sign of this disorder is:

A) apnea.
B) bradycardia.
C) muscle rigidity.
D) decreased blood pressure.