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: All chemical reactions require activation energy to get started., Fact2: Fire is a chemical reaction., Question: What does fire require to get started? (A) an engine (B) activation energy (C) water (D) energy usage (E) direct energy (F) dogs (G) activated almonds (H) adding heat
Example Output: B

Example Input: Fact1: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Children are born with an immature immune, or defense, system., Question: What are molecules that the defense system recognizes as foreign to the body? (A) Allergies (B) lungs (C) antigens (D) bacteria (E) parasites (F) atoms (G) red blood cells (H) acetic acid
Example Output: C

Example Input: Fact1: habitat destruction causes animals to move to find shelter in another habitat, Fact2: Industry is a major cause of the destruction of habitat., Question: What causes animals to move to find shelter in another habitat? (A) fossil fuels (B) flooding (C) Pesticides (D) industry (E) bullfrogs (F) Pollution (G) mines (H) wind
Example Output:
D