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: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals., Question: What is secreted by organisms like frogspawn to become a reef? (A) exocrine glands (B) food and shelter (C) exoskeleton (D) bones (E) Energy (F) Chemical energy (G) plasma (H) Energy.
Example Output: C

Example Input: Fact1: building housing developments usually requires replacing animal habitats, Fact2: Habitat destruction is the primary cause of extinction or threat of extinction for all animals., Question: Building housing developments may cause (A) eruptions (B) colder weather (C) disease (D) erosion (E) extinction (F) mutations (G) Destroy bridges (H) deforestation
Example Output: E

Example Input: Fact1: a windmill converts wind energy into electricity primarily by using mechanical energy, Fact2: Mechanical energy is the energy of moving objects., Question: what does a windmill primarily use to convert wind energy into electricty? (A) matter vibrating (B) stored energy (C) solar power (D) batteries (E) Movement of an air mass (F) heat is produced (G) energy of moving objects (H) Something to move
Example Output:
G