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: better senses have a positive impact on an animal 's survival, Fact2: An antelope has such a fine sense of hearing that it senses danger long in advance., Question: Which characteristic helps an antelope survive? (A) exoskeleton (B) poor sense of smell (C) bad manners (D) protective bony armor (E) Endocrine system (F) excellent hearing (G) bad vision (H) Males and females
Output:
F