Detailed Instructions: 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").
Problem:Fact1: Dilation occurs when cell walls relax., Fact2: When oxygen level decreases, dilatation of the blood vessels occurs., Question: What causes cell walls to relax? (A) exercise (B) sweating (C) adding heat (D) Energy (E) dilation (F) heat or cold (G) heat (H) Dehydration
Solution:
E