C. that is your answer because as your heart contracts, blood flows and IF your heart is not strong enough, it will be hard to breathe.
It needs atleast 20 minutes a day in order to have an effective cardio exercise.
If you really wanted to have a good cardio exercise that will benefit you and have a good health and healthy lifestyle, then you have to spare your 20 minutes a day.
A, eating healthy benefits helps your immune system which prevents you from getting sick
A difference between the three are that arteries are larger than capillaries and veins. However, veins are larger than capillaries.
