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: All life relies on a relatively narrow range of pH, or acidity., Fact2: All organisms have life cycles., Question: what relies on a relatively narrow range of acidity? (A) organisms (B) carbon (C) animals (D) hydrogen (E) density (F) trees (G) Most plants (H) barnacles
[EX A]: A

[EX Q]: Fact1: a long tail can be used to move through water by an animal, Fact2: Crocodiles swim mostly with their tails., Question: What can move through water? (A) pebbles (B) crocodiles (C) leeches (D) stones (E) rocks (F) Jellyfish (G) mussels (H) Nematoda
[EX A]:
B