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: Bivalves feed on plankton and nonliving organic matter., Fact2: Mussels are bivalve mollusks., Question: What feeds on plankton and nonliving organic matter? (A) barnacles (B) mollusks (C) animals (D) the Sun (E) sharks (F) graptolites (G) bacteria (H) dogs
Example Output: B

Example Input: Fact1: touch can be used for detecting texture, Fact2: Since skin is the largest organ in the body, touch is extremely important., Question: What can be used for detecting texture? (A) encoded information (B) matter vibrating (C) Chemical energy (D) Something coming from a gland (E) reflecting light (F) the largest organ in the body (G) an electron microscope (H) Electrical energy
Example Output:
F