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: friction causes an object to lose energy, Fact2: Objects An object can be one of several things., Question: What does friction cause things to lose? (A) heat (B) moisture (C) toughness (D) Energy. (E) traits (F) light (G) energy (H) cartilage
Example Output: G

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: magnetism can cause objects to repel each other, Fact2: Copper and aluminum are both attracted and repelled by magnets., Question: What can attract copper? (A) photons (B) colors (C) Energy. (D) magnetism (E) flowers (F) hormones (G) Light (H) electrically
Example Output:
D