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: Phylogeny is the evolutionary history of a group of related organisms., Fact2: Much of evolutionary biology involves the history of organic diversity., Question: Phylogeny is the history and organic diversity of what? (A) unicellular organisms (B) unrelated organisms (C) evolved areas (D) unrelated events (E) one-celled animals (F) trees and flowers (G) related organisms (H) ecosystems
Example Output: G

Example Input: Fact1: infection can cause bodily tissues to swell, Fact2: An aneurysm is a swelling in a blood vessel., Question: What can cause an aneurysm? (A) smoking (B) infection (C) bacteria (D) viruses (E) Pollution (F) steroids (G) influenza (H) rays or beams
Example Output:
B