In Cells That Are Constantly Involved in Secretion, an Equivalent

In cells that are constantly involved in secretion, an equivalent amount of membrane must be returned to the interior of the cell for each vesicle that fuses with the plasma membrane; if this does not occur, then what would happen?

A) The ratio of cell surface would decrease, compared to cell volume.
B) The cell surface would shrivel.
C) The surface area would remain constant.
D) The number of membrane receptor proteins would decrease.
E) The cell surface will keep expanding.