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: loud noises can cause animals to startle, Fact2: Flat spots on rail car wheels cause a loud banging noise., Question: Flat spots on rail car wheels can cause what to startle? (A) animals (B) water (C) planes (D) vehicles (E) people (F) nerves (G) deaf people (H) an object
Output:
A