Edema may occur (only) when
A) the plasma concentration of protein is reduced.
B) capillary hydrostatic pressure is elevated.
C) capillary endothelium permeability goes up.
D) the plasma concentration of protein is reduced and capillary endothelium permeability goes up.
E) the plasma concentration of protein is reduced, capillary hydrostatic pressure is elevated, and the capillary endothelium permeability goes up.