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: Yeast reproduce asexually by budding., Fact2: Yeasts Yeasts are simple eukaryotes ., Question: what produces asexually by budding? (A) h2o (B) Most plants (C) insects (D) graptolites (E) humans (F) swamp vegetation (G) simple eukaryotes (H) bioaerosols
Example Output: G

Example Input: Fact1: Feathers help birds fly and provide insulation., Fact2: Some birds are flightless birds., Question: Why do the flightless have feathers? (A) layers of fat (B) Sublimation (C) it needs them (D) warm-blooded (E) Air conditioning (F) Radiation (G) Insulation (H) protect them
Example Output: G

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