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: Dilation occurs when cell walls relax., Fact2: An aneurysm is a dilation, or bubble, that occurs in the wall of an artery., Question: what can be relaxed by dilation? (A) artery (B) alveoli (C) the eyes (D) the skin (E) nerves (F) sweating (G) epidermal (H) breathing
A:
A