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: Freshwater biomes have water that contains little or no salt., Fact2: Biomes are global ecosystems., Question: what is freshwater habitats that contain little or no salt? (A) Animal survival (B) allow growth (C) weathering (D) atmosphere (E) loose soil (F) ecosystems (G) salt and water. (H) oceans
Example Output: F

Example Input: Fact1: Some arthropods have special excretory structures., Fact2: All insects are arthropods., Question: what sometimes has special excretory structures? (A) insects (B) bees (C) a fish (D) barnacles (E) animals (F) carbon (G) feces (H) humans
Example Output: A

Example Input: Fact1: Populations of viruses do not grow through cell division because they are not cells., Fact2: Cancer is unregulated cell division., Question: What is one thing viruses do not cause? (A) disease (B) AIDS (C) illness (D) cancer (E) Ebola (F) fever (G) death (H) smallpox
Example Output:
D