Which of the Following Beliefs Is Part of the Body

Which of the following beliefs is part of the body of ideas known as Wilsonianism?

A) Empires must be dismantled in keeping with the principle of self-determination.
B) Democratic nations should build more arms to demonstrate their resolve against autocracy.
C) Each nation must protect its own domestic markets through tariff laws.
D) Secret agreements among nations are often necessary when national security is involved.