The great compromise because they compromise that slavery would end but the slaves wouldn't get that much in return.
A is the answer, expansionism
Theodore Roosevelt became President of the United States in 1901.
When he went to Milan, the Duke Sforza appointed him to be a military engineer where he had to design weapons and technological advancements that would help the duke gain warfare supremacy against enemies. He also built buildings and defenses, not just offensive weapons.