Which Feature Does Not Characterize Filtration by Nephrons

Which feature does not characterize filtration by nephrons?

A) It produces the renal filtrate.
B) It involves the movement of water, ions, and small molecules out of glomerular capillaries and into Bowman's capsule.
C) It occurs because pressure in glomerular capillaries is unusually high.
D) It prevents cells and proteins from entering Bowman's capsule.
E) It occurs because glomerular capillaries are less permeable to water than other capillary beds in the body.