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: astronauts require preserved food for extended flights, Fact2: An astronaut is a scientist who is a space explorer., Question: Space explorers require preserved foods for (A) ground training (B) nutrients (C) Dehydration (D) survival (E) long flights (F) short flights (G) Special disposal (H) day trips
Example Output: E

Example Input: Fact1: Sperm had to swim from male to female reproductive organs for fertilization., Fact2: Development of multicellular organisms is usually initiated by fertilization of an egg by a sperm., Question: Where does organism development start? (A) loose soil (B) housing (C) oceans (D) swamp vegetation (E) Plants growth (F) food (G) female organs (H) dry conditions
Example Output: G

Example Input: Fact1: Immunity results from immunization., Fact2: Serious side effects resulting from vaccination are extremely rare., Question: What leads to immunity and extremely rarely with serious side effects? (A) hydration (B) peachleaf willow (C) homeopathy (D) veterinarians (E) vaccination (F) Allergies (G) exposure (H) Chemical energy
Example Output:
E