Can a Connective Be Used to Join Two Other Connectives

Multiple Choice

Can a connective be used to join two other connectives?

A) No, because connectives can only join two predicates or two subjects.
B) No, because connectives can only join nouns.
C) No, because two connectives joined by a third would lack any meaning.
D) Yes, because one connective by itself would lack any meaning.
E) Yes, as in "Before and after I sleep, I brush my teeth."