Given the task definition and input, reply with output. 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: Most salamanders use their sense of smell to find a mate., Fact2: Salamanders rely on their extraordinary sense of smell to find prey., Question: What do salamanders use to find prey? (A) sound (B) a path (C) Light (D) H 2 O (E) energy. (F) Energy (G) smell (H) gourdin
G