Which Is Not a Function of Plasma Proteins

Which is not a function of plasma proteins?

A) plasma proteins are responsible for the blood colloid osmotic pressure.
B) provide a source of readily available amino acids to be utilized by the tissue cells for the synthesis of new tissue proteins.
C) antibodies are gamma globulins important in the body's defense mechanism.
D) plasma proteins play a role in buffering changes in pH in the body fluids.
E) the presence of plasma proteins in the blood is the primary factor responsible for preventing excessive loss of plasma from the capillaries into the interstitial fluid.