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: Mutualism is a symbiotic relationship in which both species benefit., Fact2: Dogs and humans are symbiotic species., Question: what exists between dogs and humans? (A) mutualism (B) gravity (C) communication (D) antigens (E) several genes (F) space between (G) electrons (H) german shepherd
Example Output: A

Example Input: Fact1: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: When a gas condenses to form a liquid it absorbs heat., Question: What does reducing heat change gas into? (A) water (B) solutes (C) energy (D) rock (E) sweating (F) tube (G) liquid (H) freon
Example Output: G

Example Input: Fact1: Sight is the ability to sense light, and the eye is the organ that senses light., Fact2: Colors use the sense of sight., Question: what can the eye sense? (A) colors (B) magnetism (C) distance (D) light (E) smells (F) chemicals (G) nerves (H) temperature
Example Output:
A