A 20-year-old female has been brought to the emergency department from a rave party where she ...

A 20-year-old female has been brought to the emergency department from a rave party where she collapsed on the dance floor. Her accompanying friends acknowledge that the woman took ecstasy early in the evening.
 
  Her heart rate is regular at 89 beats/minute and temperature 39.8 C (103.6 F) orally. The emergency team would recognize that which of the following phenomena, related to the drug, is a likely contributor to the woman's status?
  A)
  Increased peripheral vasoconstriction
  B)
  The direct pyrogenic effect of ecstasy
  C)
  The initiation of an inappropriate immune response
  D)
  Impaired temperature regulation by the hypothalamus