Some parasites and disease agents regularly change their identity before our immune system can build up substantial antibodies.How can cells change their chemical identity on a regular basis?

A)Rapid evolution produces mutations.
B)A new phospholipid bilayer is generated to replace the old layer.
C)Because the membrane is "set," the cell must reproduce and then the cell with the old membrane must die.
D)Cells eliminate all surface proteins and present only a naked lipid bilayer.
E)Different glycolipids and glycoproteins are produced internally and moved into the plasma membrane.