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: an aquatic animal requires great amounts of water to survive, Fact2: Beavers are primarily aquatic animals., Question: what requires great amounts of water to survive (A) sunlight (B) beavers (C) octopus (D) mussels (E) trout (F) carbon (G) oxygen (H) amphibians
[EX A]: B

[EX Q]: Fact1: Ants communicate with chemicals called pheromones., Fact2: Ants use receptors on their antennae to follow recruitment pheromone trails., Question: What do ants use to communicate? (A) nerves (B) heat energy (C) sound (D) binary code (E) light energy (F) Antennae. (G) megaphones (H) hand signals
[EX A]: F

[EX Q]: Fact1: TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH., Fact2: Thyroid hormones regulate the metabolic rate in the body., Question: What gland helps regulate the metabolic rate in the body? (A) dehydration (B) Veins and arteries. (C) Prostate glands (D) H2O glands (E) Pituitary gland (F) pancreas (G) sweating (H) Anal scent glands
[EX A]:
E