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: Mollusks reproduce sexually., Fact2: Mollusks are the dominant invertebrate., Question: what reproduces sexually? (A) A compound that donates proton (B) spread flower seeds (C) They have webbed feet (D) Plant reproduction (E) By wind and rain (F) passenger pigeons (G) the dominant invertebrate (H) Something found in San Francisco
Example Output: G

Example Input: Fact1: rocks interacting with wind over long periods of time causes weathering, Fact2: On Earth, rocks are weathered by wind and water, creating soil and sand., Question: What causes rocks to weather? (A) seasons (B) force (C) erosion (D) storms (E) water (F) heat (G) lightning (H) gas
Example Output: E

Example Input: Fact1: acid rain has a negative impact on water quality, Fact2: Acid rain or acidic precipitation is detrimental to plant growth., Question: precipitation detrimental to plant growth has a negative impact on what? (A) swamp vegetation (B) genetic diversity (C) Species (D) circulatory systems (E) genetic material (F) cells of organisms (G) most organisms (H) water quality
Example Output:
H