You will be given a definition of a task first, then some input of the task.
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: Flowers attract animal pollinators., Fact2: Insects, bats, birds, and other animals serve as pollinators., Question: Why do flowers attract birds? (A) photosynthesis (B) Food (C) Pollination (D) Chlorophyll (E) h2o (F) color of leaves (G) orchids (H) Produce eggs
Output:
C