I NEED ANSWERS ASAP PLEASE !!

How did the principle of self-determination affect the map of Europe after World War I?

The newly created League of Nations formed a single government over all European nations.

Germany absorbed the ethnic German populations from the Austro-Hungarian Empire, which was dissolved.

The nation-state of Germany was broken up into multiple independent, regional states.

Romania doubled in size, and the nation-states of Czechoslovakia, Yugoslavia, and Poland were created.