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: Cells are the basic units of the structure and function of living things., Fact2: All cells use glucose for energy., Question: What do all living things use for energy? (A) fish (B) kids (C) energy (D) glucose (E) The Sun (F) procreation (G) sunlight (H) food
[EX A]: D

[EX Q]: Fact1: water causes refraction of light, Fact2: Halos are produced by the refraction of light., Question: What causes halos? (A) germs (B) Pacific (C) solutes (D) water (E) storms (F) glass (G) algae (H) the sun
[EX A]: D

[EX Q]: Fact1: hibernation is used for conserving energy by some animals, Fact2: Animals hibernate in the winter., Question: what season do animals conserve energy? (A) winter (B) summer (C) dormant (D) hydration (E) mild (F) monsoon (G) autumn (H) spring
[EX A]:
A