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 switch is used to start the flow of current in an electrical circuit, Fact2: Each switch is moved up for on, and down for off., Question: the flow of current in what is moved up and down? (A) an electrical storm (B) Veins and arteries. (C) mouth of rivers (D) a short circuit (E) an electrical circuit (F) circulatory systems (G) bad wiring (H) a hydraulic system
E