It should be D. It's the one that makes the most sense. :)
The answer to this question would be A. Montesquieu believed in separation of powers. There should be three branches and each branch should be able to "check" the other. No branch would have more power than the others. The two houses of legislature would be able to block bills introduced by the president, while the president can veto any bills he found improper that were drafted by the legislative branch.
B. became an international war when Hitler and Mussolini sent men and equipment to aid Franco.
To maintain freedom of the seas