Final answer:
The text contains both a complete sentence and a sentence fragment, with the fragment being dependent on the preceding sentence for context. Sentence fragments typically lack a subject or verb, or do not form a complete idea and need to be revised for clarity. The correct option is D.
Step-by-step explanation:
The query presented here focuses on identifying whether the phrase provided is a complete sentence or a sentence fragment. The sentence in question, "We called a taxi for Mr. Hoffman. Whose car was towed from the no-parking zone in front of the firehouse." consists of a complete sentence followed by a fragment. The first part 'We called a taxi for Mr. Hoffman.' is a standalone sentence with a subject and a predicate, thus forming a complete thought.
However, the second part 'Whose car was towed from the no-parking zone in front of the firehouse.' cannot stand alone as it starts with a relative pronoun 'whose' which links it to a noun mentioned previously; it is dependent on the first part of the sentence for its full meaning. To correct this, one could combine both parts to form a complete sentence or revise the fragment to make it an independent sentence.
To avoid sentence fragments, one should ensure that each sentence contains a subject, verb, and expresses a complete thought. Fragments often occur in writing when an idea is not fully developed or is incorrectly separated from the main clause. By either joining the fragment to the main sentence, or by reworking it so it includes a subject and a verb, the writer can elevate their writing and communicate more effectively.