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: Animals can communicate with sounds, chemicals, or visual cues., Fact2: Pheromones are chemicals produced by animals allowing individuals of a species to communicate., Question: What are pheromones used for? (A) Taste (B) photosynthesis (C) spread flower seeds (D) Plant reproduction (E) Sound (F) Plants growth (G) Communication (H) Sleep
G