Our Body Recognizes the Foreign Nature of a Parasite or Disease

Our body recognizes the foreign nature of a parasite or disease agent and we soon build up antibodies. A few parasites can change their identity to evade our immune system. How could cells do this on a regular basis?

A) Replace the cholesterol within the membrane with host cholesterol.
B) Wait for the evolution of new protein membrane molecules.
C) Because the membrane is "set," a cell must reproduce and then the cell with the old membrane must die.
D) A whole new phospholipid bilayer is generated to replace the old layer.
E) New glycoproteins, similar to those found on the host cells, are produced in the cell and moved into the plasma membrane.