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: Ants communicate with chemicals called pheromones., Fact2: Pheromones are stinky chemicals excreted from glands throughout the ants body., Question: Ants communicate via (A) mechanical waves (B) telepathy (C) radio waves (D) radiative transfer (E) electrically (F) excreted chemicals (G) sensory neurons (H) during the day
F