What Happened to the Colonial System After World War II

What happened to the colonial system after World War II?

A) The United States and the Soviet Union, the new superpowers, took over the former German and Japanese colonies.
B) The colonial system met its demise in a series of incredibly violent wars.
C) The colonial system met its demise due to Germany's and Japan's defeat, the weak economic position of other former colonizers, and the United Nations' endorsement of national self-determination.
D) Colonialism was strengthened because the end of the war in Europe meant that European countries could devote more resources to their colonies.
E) Colonialism was strengthened because the newly formed United Nations endorsed the practice.