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: seeing requires light, Fact2: Vision is our ability to see., Question: What is required for vision? (A) light (B) goggles (C) food (D) smell (E) hormones (F) Protein (G) color (H) hue
Example Output: A

Example Input: Fact1: if food is not immediately used by the body for energy then that food will be stored for future use, Fact2: Basically, heat is energy., Question: When food is not immediately used for what it is stored in the body? (A) fats (B) pH (C) warmth (D) matter (E) sodium (F) heat (G) sugar (H) Mass
Example Output: F

Example Input: Fact1: Sponges are a source of food for many species of fish., Fact2: Fish and other marine animals abound here., Question: Marine animals find these to be a great source of food: (A) grain (B) nutrient (C) sponges (D) Energy. (E) sea vents (F) sodium (G) Energy (H) fungi
Example Output:
C