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: Birds evolved from a group of bipedal dinosaurs called theropods., Fact2: Bird A bird is an animal with feathers., Question: a what with feathers evolved from theropods? (A) alpacas (B) long tail (C) plant (D) animal (E) protected (F) tree (G) dinosaur bones (H) ducks
A:
D