Creatine kinase (CK) is an enzyme found in the heart, brain, skeletal muscle, and other tissues. Increased amounts of CK are released into the blood when there is muscle damage. This test measures the amount of creatine kinase in the blood.
The answer is D since doing more physical activity creates more energy and help people benefit from the exercise
You can use vinegar on it if your buying box food read the information at the back
i would say about five hours because they dont have nothing to do