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: matter vibrating can cause sound, Fact2: All matter emits vibrations., Question: What kind of matter can produce sound? (A) sensory neurons (B) all matter (C) an object (D) only liquids (E) mechanical (F) only plasma (G) only solids (H) waves
Example Output: B

Example Input: Fact1: a mirror is used for reflecting light, Fact2: Light seems to travel in rays or beams., Question: what can a mirror be used to reflect? (A) noble gases (B) air particles (C) glass (D) focusing a lens (E) rays or beams (F) photons (G) sun's heat (H) an electron lens
Example Output: E

Example Input: Fact1: Annelids are worms such as the familiar earthworm., Fact2: Earthworms are annelids meaning segmented., Question: Worms such as the familiar earthworm are what? (A) parasites (B) root growth (C) segmented (D) homogenous (E) Loose (F) allow growth (G) fertile (H) more abundant
Example Output:
C