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: Cells cannot survive without oxygen., Fact2: Life is responsible for oxygen in the atmosphere., Question: What can't cells survive without? (A) money (B) atmosphere (C) vapor (D) friends (E) Energy. (F) Energy (G) Light (H) Chemical energy
A:
B