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: Pneumonia may be caused by an infection or injury of the lungs., Fact2: Mammals breathe air with lungs., Question: What may be caused by an infection or injury of the organs used to breathe air? (A) Toxicity (B) smoking (C) fertilization (D) pneumonia (E) a broken leg (F) oxygenation (G) Dehydration (H) the skin
Example Output: D

Example Input: Fact1: Coral reefs provide food and shelter to many ocean organisms., Fact2: Coral reefs occur mainly as numerous patch reefs., Question: Where is the name of a habitat where a variety of ocean organisms often seek food and shelter? (A) gastropod shells (B) body water (C) seaweed (D) more abundant (E) whale (F) coastlines (G) algae (H) patch reefs
Example Output: H

Example Input: Fact1: freezing causes a solid to form, Fact2: Freezing is a physical change., Question: What causes solids to form? (A) Physical weathering (B) an external framework (C) Physical changes (D) adding sand (E) adding mud (F) heating liquids (G) adding water (H) A solid geometric shape
Example Output:
C