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: nuclear reactions in stars causes stars to produce light, Fact2: And, of course, the Sun is a star., Question: What in the sun causes the sun to produce light? (A) energy of moving objects (B) hydrogen and oxygen (C) heat energy (D) water (E) solar rays (F) rotation (G) nuclear reactions (H) kinetic energy
Example Output: G

Example Input: Fact1: Most mollusks have shells., Fact2: All mollusks have soft bodies., Question: What can shells protect? (A) fronts (B) animals (C) soft bodies (D) coastlines (E) fur (F) blood (G) critical organs (H) hard bodies
Example Output: C

Example Input: Fact1: Some parasites kill their host, but most do not., Fact2: Tapeworms are internal parasites of vertebrates., Question: What are hosted, but don't usually kill their host? (A) ferns (B) deadly viruses (C) insects (D) tapeworms (E) bacteria (F) orchids (G) deadly diseases (H) white blood cells
Example Output:
D