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: erosion of soil has a negative impact on the environment, Fact2: Weathering and erosion continue to shape it today., Question: What has a negative impact on the environment? (A) harmful substances (B) weathering of soil (C) saving water (D) planting trees (E) deforestation (F) massive damage (G) recycling (H) enormous damage to homes
Example Output: B

Example Input: Fact1: coal is used for generating heat by burning, Fact2: Gasoline is extremely flammable and can explode and burn if ignited., Question: coal is used for generating heat and can what? (A) melt (B) explode (C) run (D) kill (E) heat (F) energy (G) stay warm (H) freeze
Example Output: B

Example Input: Fact1: Hydrogen bonds cause water to expand when it freezes., Fact2: Hydrogen bonds Hydrogen bonds are primarily electrostatic in origin., Question: Something that is primarily electrostatic in origin causes water to expand when it what? (A) heat (B) freezes (C) a hazard (D) boiling (E) moves (F) reacts (G) expelled (H) it's state
Example Output:
B