The Second World War Marked the Most Substantial Change Ever

The Second World War marked the most substantial change ever in the context in which United States foreign policy is made. The world that emerged after the war had fundamentally changed in economic, political, and military ways. These changes made the world a more dangerous place, and altered the demands placed on foreign policy. As a result of the Second World War, international politics changed from a system:

A) in which ideology played a role in international conflicts to one in which only economic interest played a role
B) in which there were several major powers to one that was dominated by two powers
C) dominated by international organizations like the League of Nations to one in which individual countries followed only their own interests
D) dominated by two powers to one in which a number of major players had relatively equal status