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").

Ex 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

Ex Output:
B

Ex Input:
Fact1: Phylogeny is the evolutionary history of a group of related organisms., Fact2: Much of evolutionary biology involves the history of organic diversity., Question: Phylogeny is the history and organic diversity of what? (A) unicellular organisms (B) unrelated organisms (C) evolved areas (D) unrelated events (E) one-celled animals (F) trees and flowers (G) related organisms (H) ecosystems

Ex Output:
G

Ex Input:
Fact1: plasma is formed by electrons separating from atoms in stars, Fact2: Metal atoms are ionized in an intense plasma., Question: what does plasma ionize? (A) Joules (B) metal (C) coal (D) SO2 (E) homes (F) matter (G) Energy. (H) energy

Ex Output:
B