You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
Q: Paragraph: Inhaling, or breathing in, increases the size of the chest, which decreases air pressure inside the lungs.
 Question: If Mona is running a race and her chest expands, what happens to the amount of air pressure in her lungs? 
 Choices: A)increases 
B)decreases
A:
decreases