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").

[Q]: Fact1: threatening behavior by predators causes a porcupine to extend its quills, Fact2: Puffers are smooth skinned while Porcupines have the characteristic spines or quills., Question: What does a porcupine do with its spines when it's threatened? (A) killing insects (B) Shoot them (C) kill them (D) protect them (E) Extend them (F) Shed them (G) Retract them (H) behave
[A]: E


[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
[A]: B


[Q]: Fact1: an aquatic animal requires great amounts of water to survive, Fact2: Survival is about making a living., Question: An aquatic animal requires a great amount of what to live? (A) oxygen (B) solutes (C) water (D) air (E) enemies (F) salt (G) rain (H) liquid
[A]:
C