You will be given a definition of a task first, then some input of the task.
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: if gas is heated then that gas will expand, Fact2: Nitrogen gas is the most abundant gas in the atmosphere., Question: What does nitrogen do when it's heated (A) Expands (B) boiling (C) moves (D) Solidifies (E) Melts (F) heat (G) burning (H) Condenses
Output:
A