<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.
Brutus announces that he wants to explain why he killed Caesar, while Antony says that he is simply there to give Caesar a proper burial is the correct answer. Hopefully i helped!