Given That the Net Filtration of Fluid Out of the Capillaries

Given that the net filtration of fluid out of the capillaries averages about 3 liters per day, how is blood volume maintained in light of this apparent fluid loss?

A) The lymphatic system returns filtered fluid to the blood.
B) While fluid moves out across the capillary, it tends to move inward across veins.
C) The net filtration is equally balanced by absorption.
D) Gravity moves the fluid to the lowest point in the body, where the fluid is absorbed.
E) The kidneys are involved in the reabsorption of the remaining fluid.