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: cell division often causes growth, Fact2: Mitosis is cell division., Question: What often causes growth? (A) exercise (B) hormones (C) Atrophy (D) collagen (E) Earthworms (F) Apoptosis (G) Necrosis (H) Mitosis
Example Output: H

Example Input: Fact1: Evolution is a change in the characteristics of living things over time., Fact2: Evolution relies on random chance acts to cause mutations., Question: What causes changes in characteristics of living things over time? (A) mutations (B) science (C) parents (D) environment (E) light energy (F) news (G) alleles (H) animals
Example Output: A

Example Input: Fact1: a compass is used to navigate oceans, Fact2: Ocean waves travel on the surface of the water., Question: A compass is used to travel on the surface of what? (A) planes (B) water (C) stars (D) boats (E) marine (F) clouds (G) poles (H) sun
Example Output:
B