Answer: A.Etruria.
Explanation:
Etruria was an area of Central Italy, found in part of what are presently Tuscany, Lazio, and Umbria.
The Etruscans were the ancient people of Etruria. They became a powerful culture in Italy by 650 BC, and their impact can be found in the Po River Valley and Latium, Campania and through their connection with the Greek colonies in the south of Italy.
Assuming the diplomats you are referring to are Benjamin Franklin, John Jay, and John Adams, the correct answer is John Adams.
He was the second president of the United States in America, right after George Washington. Franklin and Jay, even though they were influential politicians and diplomats, never became presidents.
The first person who designed the steamboat was Robert Fulton