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: Petals attract pollinators to the flower., Fact2: Pollination is by flies, wasps, and bees., Question: In order to attract flies, wasps, and bees, what does a flower employ? (A) petals (B) colors (C) insects (D) camouflage (E) Energy (F) scentless (G) lack of color (H) pollen
A