Q: 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: Plants release oxygen during the day but not during the night., Fact2: Oxygen from the air is needed by the body in order to live., Question: What do plants do during the day but not during the night? (A) It helps them survive (B) Help the body to live (C) preventing heat transfer (D) by making heat (E) Generating heat (F) converting electricity to heat (G) Release energy (H) adding heat
A:
B