Ice is better for acute injuries, while heat is better for new and nagging injuries. Ice causes muscles to tighten and restricts blood flow, while heat does almost the opposite. Ice can slow inflammation, which is better for an acute injury, like an ankle sprain.
Most of these I would advise you not to handle food with, but the most seriousness of these diseases is Typhoid Fever. Typhoid Fever is obtained by food an infectious person handles. The answer is C.
