You will be given a definition of a task first, then some input of the task.
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: If the switch is open, electricity flows, and the light is on., Question: What happens when the light switch is open? (A) The current can't flow (B) adding heat (C) It's dark (D) The light is off (E) The current can flow (F) massive damage (G) daylight changes (H) Earth revolving around the sun
Output:
E