A Primary Function of Plasma Membranes Is to

A primary function of plasma membranes is to

A) allow only water and non-polar molecules to pass into and out of cells and organelles.
B) allow the passage of water into and out of cells but prevent movement of other molecules.
C) regulate the flow of molecules into and out of cells and organelles.
D) provide an impermeable protective barrier, sealing cells and organelles from their surrounding environment.
E) provide a protective barrier but allow specific ions to pass in and out of the cell.