Answer:
It's D.) Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.
Step-by-step explanation:
When you exercise, you are using a lot of oxygen so, your body breathes heavily to get the oxygen back. Anaerobic is a lack of oxygen so, we can rule out the first two. The third one says the body needs more carbon dioxide, but that is waste to our bodies. Therefore the answer is D.