<span>The proposition would be around. The propositions typically go before a noun. We drove around the city late at night seems to be the answer</span>
A prepositional phrase tells where one noun is in relation to another noun. In this sentence the preposition around tells you where "we" are in relation to the city. A prepositional phrase ends with a noun. None of the other sentences have a noun that follows the word that could be a preposition.
<span>Choice (D) is the most grammatically correct sentence. This sentence has a dependent clause followed by an independent clause, both separated by a comma. This allows for the two clauses to be properly joined and for the sentence to contain a logical flow.</span>