Answer:B
Explanation: The UN was created to help prevent other countries from doing war crimes and getting away with it. Established to keep peace in the world.
Constantine issued the Edict of Milan.
Answer:
C) Scare economic opportunities
Explanation:
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.