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: a rainbow is formed by refraction of light by separating light into all different colors, Fact2: Introduction A rainbow is often given as an everyday example of a spectrum., Question: A spectrum is formed by refraction of light by separating light into all different what? (A) categories (B) dyes (C) photons (D) pigments (E) light (F) colors (G) Energy. (H) energy
Example Output: F

Example Input: Fact1: Reproduction is the process by which organisms give rise to offspring., Fact2: Darwin's theory of evolution depends on more offspring than are needed to maintain the species., Question: What is reproduction needed for? (A) fighting (B) Quality of life (C) sound (D) Maintain a species (E) Most plants (F) entropy (G) agriculture (H) spread flower seeds
Example Output:
D