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: a radio converts electrical energy into vibrations, Fact2: Electrical energy refers to energy associated with the flow of electrons., Question: what does a radio convert into vibrations? (A) flow of protons (B) Heart rate (C) h2o (D) encoded information (E) Loud noises (F) flow of electrons? (G) television (H) Through play
F