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: Mammals can also generate little bursts of heat by shivering., Fact2: Polar bears are mammals., Question: What can generate little bursts of heat by shivering? (A) alpacas (B) bacteria (C) animals (D) polar bears (E) phytoplankton (F) rabbit (G) viruses (H) humans
Example Output: D

Example Input: Fact1: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insect wings are attached to the dorsal side of their thorax., Question: What side of an insect are wings attached to? (A) white (B) dorsal (C) protected (D) abdomen (E) elytra (F) three (G) strong (H) tail
Example Output: B

Example Input: Fact1: Roundworms make up the phylum Nematoda., Fact2: Nematodes are simple roundworms., Question: What phylum are Nematodes in? (A) Most plants (B) ferns (C) parasites (D) Epidermis (E) white (F) insects (G) graptolites (H) Nematoda
Example Output:
H