Detailed 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").
Problem:Fact1: sonar is used to find the location of an object, Fact2: Surface ships use sonar to locate and track submarines., Question: How do ships find submarines? (A) guns (B) Computer (C) Sight (D) move (E) Sonar (F) sound (G) Diving (H) Satellite
Solution:
E