As blood circulates from arteries into capillaries, the total cross-sectional area of capillaries
A) decreases and causes the blood velocity to decrease.
B) is the same as the total cross-sectional area of arteries and blood velocity is equal between arteries and capillaries.
C) increases and causes the blood velocity to decrease.
D) increases and causes the blood velocity to increase.
E) decreases and causes the blood velocity to increase.