A reason why the Civil War lasted four years is that the Union had to fully conquer the South.
I believe the answer is C
He discovered that they had a highly advanced civilization with many current amenities such as a postal service. He later took these back to Europe and implemented them into their equality developed nations.
A King should do what ever is possible to unite his state
Machiavelli was all about doing whatever it took even if it was considered immoral.