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").

Example Input: 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
Example Output: D

Example Input: Fact1: Organisms use lipids to store energy., Fact2: Triglycerides are a storage form of energy., Question: In what form do organisms use lipids? (A) Triglycerides (B) glucose (C) layers of fat (D) adding heat (E) reducing acid rain (F) hydrocarbons (G) recycling (H) By wind and rain
Example Output: A

Example Input: Fact1: Polyps usually reproduce asexually., Fact2: Asexual reproduction occurs in several different ways., Question: Polyps usually reproduce how? (A) several different ways (B) sharing seeds (C) during the day (D) sharing sperm (E) spread flower seeds (F) photosynthesis (G) Absorb light (H) sexually
Example Output:
A