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: being exposed to wind can cause erosion of soil, Fact2: Soil Erosion Soil erosion is caused by disturbance of a land surface., Question: what can being exposed to wind cause? (A) a lot of human deaths (B) death and devastation (C) increase in carbon (D) forest is destroyed (E) a tree falling (F) disturbance of land surface (G) loss of sunlight (H) low tides
Example Output: F

Example Input: Fact1: insulated material can be used for keeping warm, Fact2: An insulated cup with a cover is great for keeping beverages warm., Question: How do you keep a cup hot? (A) less water (B) electricity (C) heat energy (D) adding heat (E) energy usage (F) insulation (G) squeeze (H) energy
Example Output: F

Example Input: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: Sulfur in the coal becomes sulfur dioxide when burned., Question: Acid rain can be a result of: (A) burning (B) citric acid (C) flow of electrons (D) fashion (E) acid wash (F) chemical changes (G) burning coal (H) Pollution
Example Output:
G