The correct answer is: B) Just inside the lobby of the Air and Space Museum, the Wright brothers' plane and Lindbergh's Spirit of St. Louis.
Sentence fragments are groups of words that do not form a complete sentence, as they consist only of dependent clauses when regular sentences always have an independent clause (which means having a subject and a verb, and expressing a complete thought).
Option B is missing a verb and, therefore, is a sentence fragment.