The two choices that support my answer are
B The Mitocondria in the muscles generate through cellular respiration.
E The lungs support cellular respiration by providing need to produce ATP from the carbohydrates
Step-by-step explanation:
Eating lots or carbohydrate or carb loading leads to increase the rate of aerobic respiration in various cells such as liver,muscle that generate energy in form of ATP and the excess energy is being stored. This excess stored energy helps to maintain healthy body physiology among marathon runners .
During the Catabolism of carbohydrates in aerobic condition oxygen is very much essential.Oxygen is brought into cell by the normal physiologic functioning of lungs.In presence of oxygen carbohydrates are broken down by various metabolic pathways such as glycolysis to generate ATP .