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: glass cause refraction of light, Fact2: Refraction Refraction is the bending of light rays., Question: Glass causes the _ of light (A) intensification (B) bending (C) photons (D) a wave (E) Pollution (F) blocking (G) heat (H) amplification
[EX A]: B

[EX Q]: Fact1: if an animal lives under ground then that animal will be protected from a wild fire, Fact2: Many squirrels live in burrows under the ground instead of in the trees., Question: Many squirrels are protected from what by their burrows (A) disease (B) wild fire (C) A virus (D) Wet weather (E) sun's heat (F) cold air (G) Winter (H) deforestation
[EX A]: B

[EX Q]: Fact1: Most hormones are regulated by feedback mechanisms., Fact2: Hormones act as chemical messengers., Question: what are regulated by feedback mechanisms? (A) trucks and cars (B) h2o intake (C) chemical messengers (D) some prokaryotes (E) antigens that cause allergy (F) skin cells (G) density (H) prokaryotic cells
[EX A]:
C