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).

Ex Input:
Paragraph: More pollutants mean poorer air quality.
 Question: When a river gets emptied of a lot of waste chemicals it becomes 
 Choices: A)cleaner 
B)dirtier

Ex Output:
cleaner


Ex Input:
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

Ex Output:
decreases


Ex Input:
Paragraph: Air pressure is less at higher elevations.
 Question: We need oxygen masks when we climb Everest because the air pressure is 
 Choices: A)low 
B)high

Ex Output:

low