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: melting is when solids are heated above their melting point, Fact2: Ice cubes melt in liquid water., Question: What, when heated, turns into liquid water? (A) gasoline (B) oil (C) a solute (D) fire (E) ice cubes (F) a prism (G) mussels (H) Energy.
Example Output: E

Example Input: Fact1: refracting sunlight causes sunlight to split into different colors, Fact2: Light passing through a prism is refracted or divided into the colors of the spectrum., Question: Sunlight passing though a prism is split into (A) coronal discharge (B) heat energy (C) energy (D) small bits of matter (E) Energy. (F) neutrinoes (G) a spectrum (H) white
Example Output: G

Example Input: Fact1: a drought can change the color of an environment from green to brown, Fact2: Lack of rain last winter has intensified Arizona's drought., Question: what can change the color of an environment from green to brown? (A) lack of rain (B) deforestation (C) precipitation (D) Greenhouse gases (E) climate (F) h2o (G) forests (H) swamp vegetation
Example Output:
A