Given the task definition and input, reply with output. 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).

Paragraph: More pollutants mean poorer air quality.
 Question: If Mona lives in a city that begins producing a greater amount of pollutants, what happens to the air quality in that city? 
 Choices: A)increases 
B)decreases
decreases