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").
Problem:Fact1: Most hormones are regulated by feedback mechanisms., Fact2: Hormones are chemical messengers in the body., Question: What regulates chemical messengers in the body? (A) several genes (B) wooden mechanisms (C) antigens that cause allergy (D) feedback mechanisms (E) Lymphocytes (F) mechanical mechanisms (G) electronic mechanisms (H) Two or more sets of alleles
Solution:
D