You will be given a definition of a task first, then some input of the task.
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: When a person smokes there are chemicals released by the tobacco that enter the lungs. Because the lungs have to work harder to remove the chemicals, the body has to work harder to get the air needed to survive.
 Question: If Mona is a non-smoker, but decides to start smoking, what happens to the difficulty her lungs experience in removing chemicals from the air? 
 Choices: A)increase 
B)decrease
Output:
increase