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").
Input: Fact1: a barometer is used to measure air pressure, Fact2: Air pressure is a measure of the weight of the air., Question: What does a barometer determine? (A) 295 degrees Kelvin (B) precipitation (C) liquid pressure (D) visibility (E) water pressure (F) melanin content (G) melanin amount (H) weight of air
Output:
H