Answer:
Your answer would be B.
Explanation:
Sentence fragments are group of words that look like sentences, but aren't. In order to be a sentence, group of words need at least one independent clause. An independent clause is any group of words that contain both a subject and a verb and can stand on its own because it represents a complete thought. On the contrary, sentence fragments never have independent clauses, but instead are dependent clauses or phrases. B is a sentence fragment because it is a group of words made up of coordinated NPs; it is a phrase: a pencil, four sheets of paper, and a ruler. It neither contains a subject nor a predicate.
