The purpose of antibodies is to .a. poke holes in the cell membrane of an invader to cause extracellular fluid to enter the cell making it swell and b. eventually rupture the cell membrane. c. inject toxins into the invading pathogen to destroy it. d. inactivate its DNA so the pathogenic cell is unable to function. e. mark the invading cell for destruction and to prevent the invader from interacting with other cells.