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").

Input: Consider Input: Fact1: Biomass is the total mass of organisms at a trophic level., Fact2: Each stage is a trophic level., Question: The total mass of organisms in an environmental stage is called what? (A) food pyramid (B) extinction (C) ecological pyramid (D) food chain (E) vegetation (F) food (G) ligt (H) biomass

Output: H


Input: Consider Input: Fact1: Viruses cause many human diseases., Fact2: Examples include influenza, rabies, HIV, and Herpes viruses., Question: What causes human disease? (A) HPV (B) UV (C) minerals (D) Tamiflu (E) mold (F) HIV (G) human growth (H) CFCs

Output: F


Input: Consider Input: Fact1: propulsion is used for flying by a spacecraft, Fact2: Apollo 13 spacecraft is launched., Question: what uses propulsion for flying? (A) mammals (B) kites (C) jellyfish (D) vertebrates (E) angiosperm (F) Apollo 13 (G) chickens (H) cars


Output: F