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: Mating is generally preceded by courtship., Fact2: Males and females mix only to mate., Question: What engages in courtship? (A) Males and females (B) elephants (C) fur seals (D) it keeps an organism warm (E) science (F) Males and males (G) books (H) warm-blooded
A:
A