Which of the Following Best Defines the Term "Exocytosis

Which of the following best defines the term "exocytosis"?

A) The discharge of ions or small molecules from a cell by protein pumps in the cell membrane
B) The uptake of material at one domain of a cell's surface and its discharge from the opposite side of the cell
C) The process by which proteins move from one cytoplasmic compartment to another
D) The discharge of proteins in cytoplasmic vesicles from a cell following fusion of the vesicles with the plasmalemma
E) Diffusion of lipid-soluble molecules from a cell across the cell membrane