Is It Possible That a Sentence Uses a Connective, but Only

Is it possible that a sentence uses a connective, but only has one subject and one predicate?

A) No, because if a connective is used, there must be more than one subject.
B) No, because the connective would not be joining anything.
C) No, because if a connective is used, there must be more than one predicate.
D) Yes, because the connective could join the subject to the predicate.
E) Yes, because the connective could be serving as the verb.