If Your Body Is Healthy and the Functions Maintaining Homeostasis

If your body is healthy and the functions maintaining homeostasis are working correctly, how can a person get heat stroke?

A) They're overweight and thus have too large a surface area to allow sufficient heat loss.
B) They're out of shape, so they sweat too much.
C) Conditions are such that the body heats up faster than its cooling effectors can cool it down.
D) They lose too many salts in sweat.
E) The environment may be very dry, leading to excessive evaporation.