Virginia plan advocated two legislative houses of which membership would be based on population. New Jersey plan advocated one legislative house, membership in which would be equal for all states.
D. Castiglione
Cesare Borgia was the Son of the Pope and Cosimo de Medici's family ruled Florence, so neither have anything to do with the royal family of Mantua. Machiavelli wrote the Prince, so that is not the correct answer either. Castiglione was part of the Royal family of Mantua and did write the Book of the Courtier. So D is the correct answer.
Answer: England ceded Florida to the USA in 1819.
Spain gave Florida to England in exchange for Havana, Cuba at the end of the 7-Years War 1756-1763. But England lost Florida to Spain after the American Revolution.
With the Truman Doctrine, President Harry S. Truman established that the United States would provide political, military and economic assistance to all democratic nations under threat from external or internal authoritarian forces.