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").
Input: Fact1: Some birds are pollinators that co-evolved with plants., Fact2: Hummingbirds are the most common bird pollinators., Question: Hummingbirds are what they are today as a necessary consequence of their relationship to what? (A) a feeder (B) humans (C) bees (D) survival (E) animals (F) Plants (G) Earth (H) weeds
Output:
F