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: bees convert nectar into honey, Fact2: Flowers secrete nectar., Question: what do bees use to convert into honey? (A) male gametes (B) sunflower seeds (C) ribonucleic acid (D) flower secretion (E) single celled organisms (F) oak trees (G) unicellular organisms (H) melanin content
A:
D