Answer: B) on a motorized treadmill
Explanation:
Cardiovascular fitness is measured by measuring the ability of the lungs, and heart to transfer the oxygen to the working muscles. It also measures the utilization of oxygen by the muscles through exercise.
The use of motorized treadmill is the ideal option as when the person walks or run over the treadmill the requirement for oxygen will increase as a result of this the rate of respiration and heart pumping rate will also increase. This will increase the cardiovascular endurance.