Final answer:
If a person who uses Ecstasy starts feeling too hot at a crowded party and immediately drinks lots of fluids, they c. may be in trouble and may experience water intoxication, but not hypothermia.
Step-by-step explanation:
When a person who uses the drug Ecstasy starts feeling too hot at a crowded party and drinks lots of fluids immediately, they may be in trouble as they may experience water intoxication. Water intoxication, also known as hyponatremia, occurs when the intake of excessive amounts of water dilutes the concentration of sodium and other salts in the bloodstream, which can disrupt brain, muscle, and heart functions. Therefore, option C) may be the correct answer: the person may be in trouble as they may experience water intoxication, but not hypothermia or excessive cooling.