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: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Supersaturation is inferred to be a common state for atmospheric haze particles., Question: What decreases the temperature by blocking the Sun? (A) cilia (B) the Sun (C) the wind (D) haze (E) ice (F) fat (G) rain (H) acids
Example Output: D

Example Input: Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Pysical weathering is the mechanical breakdown of rocks., Question: What is when rocks are broken down? (A) roof weathering (B) Plant growth is reduced (C) brick weathering (D) Physical weathering (E) remains of prehistoric life (F) at or near the margins (G) home weathering (H) major threat to health
Example Output: D

Example Input: Fact1: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: Animals at underwater hydrothermal vents are unique., Question: What are organisms on the ocean floor? (A) conventional (B) common (C) unique (D) protected (E) parasites (F) tortoises (G) normal (H) bacteria
Example Output:
C