Detailed 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").
Q: Fact1: Endocrine hormones travel throughout the body in the blood., Fact2: Hormones, produced by the endocrine system, act as chemical messengers targeting specific organs., Question: What travel throughout the body in the blood? (A) testes (B) matter vibrating (C) zygotes (D) gametes (E) kinetic energy (F) chemical messengers (G) Veins and arteries. (H) electromagnetic energy
A:
F