In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: if an animal sweats then that animal 's bodily water decreases, Fact2: Just like sweating, the evaporation of the water cools the body., Question: why do animals sweat? (A) energy (B) cool off (C) evaporation (D) Heat energy (E) reduced heat (F) food (G) reduce (H) heat
B