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").

[EX Q]: Fact1: Hormones are chemical messengers that control many body functions., Fact2: Growth hormone is in many ways an anti-aging hormone., Question: What controls anti-aging? (A) A computer (B) air (C) chemical messengers (D) ice (E) an electric stove (F) Electrical energy (G) water (H) Chemical energy
[EX A]: C

[EX Q]: Fact1: Streams may start with runoff or water seeping out of a spring., Fact2: Most water comes from precipitation., Question: What do most streams start with? (A) swamp vegetation (B) heat produced (C) loose dirt (D) Decibels (E) Veins and arteries. (F) matter vibrating (G) visible energy (H) precipitation
[EX A]: H

[EX Q]: Fact1: Playing is one way mammals and other animals learn how to behave., Fact2: Service animals are trained to behave properly in public settings., Question: What is one way mammals are trained to behave properly in public settings? (A) walking (B) hunting (C) distracting (D) sweating (E) playing (F) stamina (G) fighting (H) Movement
[EX A]:
E