Answer:
It is a sentence fragment because it does not have a subject.
Explanation:
First option: The first option is incorrect because there are NO independent clauses, which are a group of words that can stand by itself. Because there's a missing subject, it cannot stand by itself.
Second Option: The second option is incorrect because run-on sentences result from two or more complete sentences without any punctuation. This is a fragment, so it can't even be a sentence.
Third Option: The third option is correct because as it states, "it does not have a subject"; only a predicate.
Fourth Option: The fourth option is incorrect because run-on sentences have two complete sentences as one sentence without any punctuation. This isn't even a sentence, so it can't be a run-on sentence.
