When the function of the newly made polypeptide is to be secreted from the cell where it has been made,what must occur?

A)It must be translated by a ribosome that remains free of attachment to the ER.
B)Its signal sequence must target it to the ER, from which it goes to the Golgi.
C)It has a signal sequence that must be cleaved off before it can enter the ER.
D)It has a signal sequence that targets it to the cell's plasma membrane where it causes exocytosis.
E)Its signal sequence causes it to be encased in a vesicle as soon as it is translated.