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: Adjusts controls to regulate temperature and humidity of animals' quarters., Question: What is used to adjust controls to regulate temperature? (A) glass (B) motors (C) neurons (D) power (E) copper (F) sweat (G) forces (H) keratin
F