Which of the following options is a complete sentence?

Question

Quizplus · Accepted Answer

Every sentence must contain a subject and predicate.
The subject of a sentence is the person, place, thing, or idea that is doing or being something. You can find the subject of a sentence if you can find the verb. Ask the question, "Who or what is performing the action in the sentence?" and the answer to that question is the subject.
The predicate is the part of a sentence or clause containing a verb and stating something about the subject.
Why hasn't Jenny come to your party? →  Jenny hasn't come to the party.
"Why hasn't Jenny come to your party?" is correct because the subject is "Jenny" and the predicate is "hasn't come to the party."
Why Jenny not in your party? is not a complete sentence because it does not contain a verb.
Jenny not in your party, why? is not a complete sentence because the question word "why" should come at the beginning of the question.
Why hasn't come to your party?is not a complete sentence because it does not contain a subject.

Which of the Following Options Is a Complete Sentence