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: seeing requires light, Fact2: Sight is the mere ability to see, and the eye's responses to light shining into it., Question: What do eyes require? (A) a form of oxygen (B) Light shining into it (C) Exposure to oxygen and water (D) A dark environment (E) Contact lenses (F) melanin amount (G) tissue made of chondrocytes (H) Glasses
Example Output: B

Example Input: Fact1: microscope is used to see small things by biologists by making them appear bigger, Fact2: Biologists study living creatures., Question: What makes living creatures appear bigger? (A) fur and fat (B) xrays (C) squids (D) microscopes (E) deuterostomes (F) hearing (G) screen (H) mutations
Example Output:
D