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: Playing is just one of many ways that mammals and other animals learn how to behave., Fact2: Mammals include lions, bears, dogs, horses, cattle and antelopes., Question: What learns to behave through playing? (A) otters (B) bacteria (C) viruses (D) rocks (E) lions (F) animals (G) humans (H) Birds
A:
E