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").
Q: Fact1: Light enters the eye through an opening called the pupil., Fact2: Light is the visible form of electromagnetic energy., Question: Electromagnetic energy enters the body through what part of the eye? (A) energy transport (B) pupil (C) iris (D) skin (E) eyehole (F) lenses (G) organ (H) nerves
A:
B