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: Skin color is another polygenic trait., Fact2: Tourette syndrome a polygenic disorder ., Question: what is tourette syndrome? (A) malaria (B) cancer (C) trait (D) fever (E) cell (F) antigen (G) virus (H) Type O
Example Output: C

Example Input: Fact1: natural disasters can cause animals to leave an environment, Fact2: Animal migration is mystery of nature., Question: Natural disasters can cause (A) deforestation (B) kill them (C) Pollution (D) disease (E) deadly (F) erosion (G) migration (H) flooding
Example Output: G

Example Input: Fact1: Mollusks are invertebrates such as the common snail., Fact2: An invertebrate is an animal that has no spine, or backbone., Question: What has no backbone? (A) chimp (B) snail (C) bats (D) insects (E) monkey (F) sharks (G) coward (H) salmon
Example Output:
B