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: Cancer is a disease in which cells divide out of control., Fact2: Chemotherapy works on cells that are dividing., Question: What helps stop cells multiplying in cancer? (A) the skin (B) Honey (C) sweating (D) Chemotherapy (E) H2O (F) Chemical energy (G) Titanium (H) bioaerosols
Example Output: D

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: Competition may lead to aggressive behaviors or displays of aggression., Fact2: With so many does and so few older bucks, there is little competition for mating., Question: What displays less aggression when there are fewer older members? (A) bacteria (B) rocks (C) bucks (D) bamboo (E) toads (F) cats (G) dogs (H) the Sun
Example Output:
C