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: decomposition increases amount of organic matter in soil, Fact2: Fungi are involved in decomposition, as well., Question: What can help increase the amount of organic matter in soil?  (A) Fungi (B) mussels (C) pine (D) worms (E) animals (F) Enzymes (G) solutes (H) trees
Example Output: A

Example Input: Fact1: Plants are the major producers in terrestrial biomes., Fact2: Grasses are very distinctive plants., Question: What is a producer in terrestrial biomes? (A) food (B) Oak (C) mammals (D) flowers (E) earth (F) grass (G) Trees (H) mushrooms
Example Output: F

Example Input: Fact1: Macroevolution is evolution over geologic time above the level of the species., Fact2: Dates are provided for the recognized eras and periods of geologic time., Question: Macroevolution above the level of the species happens over what (A) seasons (B) eras (C) scale (D) Earth (E) plates (F) days (G) minutes (H) years
Example Output:
B