What is a fundamental requirement of a complete sentence?
AIt must contain an object and a verb.
BIt must have a subject and a predicate.
CIt must always contain an adjective.
DIt must end with a comma.

AIt must contain an object and a verb.
BIt must have a subject and a predicate.
CIt must always contain an adjective.
DIt must end with a comma.
Related Questions:
Turn the following into indirect speech:
The young sparrow said, "Mother, what is that queer object?"