Available options: A). Do not drink caffeinated beverages before the test. Avoid unsupervised swimming or doing heavy lifting.; B). Keep a smoke-safe bag inside a bottle of water or else you will come across a gas source that pollutes the air passages. Do not eat or drink something prior to the test that could injure you or others.; C). Do not drink alcohol within 4 hours of the test. Do not exercise strenuously within 30 minutes of the test.; D). Avoid taking pain relievers (acetaminophen) or avoiding certain foods and drinks. Pick a safe location for the exam.;Choose from options above and answer: What most naturally follows?

How to take a spirometry test
Avoid activities which might affect your normal lung function.
To ensure accurate results, you need to take the following precautions in the hours leading up to the test :
Ask your healthcare provider which medications you should avoid on the day of the test. Do not smoke within 24 hours of the test.
Answer:
C).