In a hot and humid environment, a 32-year-old man with intestinal spasms presented with fever after taking scopolamine, his body temperature returns to normal after moving to a cool environment. The most likely cause of fever for this man is
A．Dysfunction of heat dissipation center
B．Dysfunctions of thermogenic center
C．Set point up
D．Sweating dysfunction
E．Hypothalamic thermoregulation dysfunction