To correct a fragment, you can typically add an independent clause. A fragment is an incomplete sentence that lacks either a subject, a predicate, or does not express a complete thought. By adding an independent clause, you can provide the necessary context and completeness to make the sentence grammatically correct.
For example, if you have the fragment "Running down the street," you could correct it by adding an independent clause: "Running down the street, I tripped and fell."
Other options such as adding a dependent clause or a prepositional phrase might help enhance the sentence, but they won't necessarily fix the fragment by themselves. Adding a capital letter and period is only useful for punctuation, while adding a subject or predicate may not always resolve the fragment issue unless they help form a complete thought.