Answer: B. Quotes from a well-respected author
Explanation: an audience is a group of spectators at a public event; listeners or viewers collectively, as in attendance at a theater, speech, or concert. Before a formal audience, we should prepare a formal speech, which should be very correct and serious rather than relaxed and friendly, and usually doesn't have visual aids. From the given options, the only one that would be appropriate for a speech before a formal audience is to include quotes from a well-respected author.
Caesar changed the course of the history of the Greco-Roman world decisively and irreversibly. worlds. Even people
“It was a thrilling experience to be whizzed in a “lift” a quarter of a mile heavenward, and to see New York spread out like a marvellous tapestry beneath us. There was the Hudson – more like the flash of a sword-blade than a noble river.” I hope this answer helps you with what you are looking for.