Given the task definition and input, reply with output. 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: sweat is used for adjusting to hot temperatures by some animals, Fact2: Perspiration is produced by sweat glands in the skin and is secreted through pores., Question: What is used for adjusting to hot temperatures by some animals? (A) secretion (B) autoregulation (C) evaporation (D) hibernation (E) hormones (F) hydration (G) perspiration (H) Pituitary gland
G