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: plucking a string can cause that string to vibrate, Fact2: All guitars produce sound through the mechanical vibration of strings., Question: How does a guitar create sound? (A) electrically (B) mechanical (C) Amplifying it with electricity (D) The musician being trained (E) Tuning it properly (F) Plucking a string (G) Through play (H) lowered energy cost
Solution:
F