Instructions: 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").
Input: Fact1: Most carcinogens cause cancer by producing mutations in DNA., Fact2: Jet fuels are carcinogens., Question: What in an airplane can mutate organisms? (A) an anion (B) Damages them (C) Jet fuel (D) light energy (E) Toxicity (F) Allergies (G) kill them (H) heat
Output:
C