What does a complete sentence require?

A complete sentence requires both a subject and a verb, which is why the correct answer is focused on this combination. The subject is the part of the sentence that indicates who or what the sentence is about, while the verb expresses the action or state of being. Together, these two components create a complete thought that can stand alone as a sentence.

While adjectives, prepositions, and conjunctions are important elements of sentences that can add detail or connect ideas, they are not essential to form a complete sentence on their own. For instance, a complete sentence could simply be "The dog barks," which has both a subject ("the dog") and a verb ("barks"), but lacks adjectives, conjunctions, or prepositions.

This fundamental structure ensures that the sentence conveys a clear and complete idea to the reader.