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: keeping food cold is used for keeping food fresh, Fact2: A refrigerator that keeps food cold., Question: What is a refrigerator used for? (A) Electrical energy (B) A place to hang magnets (C) Cooling your home (D) staying warm (E) A doorstop (F) electricity (G) energy usage (H) Keeping food fresh

Output: H

Input: Consider Input: Fact1: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Rivers, rainwater, well water and most lakes contain fresh water., Question: What are canyons formed by? (A) clouds (B) stars (C) erosion (D) loose soil (E) wind (F) ice wedging (G) rainwater (H) calcite
Output: G