B is a fragment. A fragment is any sentence that either doesn't have a subject, or that doesn't have a verb.
B has no verb. The house(which is the subject) is doing nothing.
If you wanted to correct this sentence you would get something like: A house with no cars in the driveway usually means that no one is home.
B is the right answer ;
The sentence fragment among the given options is B: 'A house with no cars in the driveway,' as it lacks a verb and does not express a complete thought. The other options are complete sentences. To correct the fragment, additional information or a verb could be added.
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