Q: 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").
Fact1: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel., Fact2: Carbon monoxide can kill., Question: Burning fuel in a furnace can (A) fire interns (B) kill (C) death (D) furnish a home (E) freeze water (F) harm (G) loss (H) expand
A:
B