Answer:
A- On Saturday at five
Step-by-step explanation:
A sentence fragment is a phrase that lacks a complete thought even though it may have a subject and a verb. A sentence of independent clause should be able to stand on its own and does not need to rely on other parts of the sentence for a true meaning to me made out of it.
Fragments does not usually tell the entire story and the missing elements would keep the reader hanging without a sense of the full thought.