Answer:
The correct answer answer is option B) It is missing a subject and a verb.
Step-by-step explanation:
A complete sentence is one that has meaning on its own and can stand by itself. A sentence fragment, on the other hand, is one that has no meaning on its own since it misses mandatory parts of speech to be complete (subject and verb).
The rest of the options are incorrect since a direct object is not mandatory for a sentence to be consider complete. Also, a sentence can be complete and short ("the day is sunny").