This Map, of the Post-Cold War Fracturing of Yugoslavia, Demonstrates

This map, of the post-cold war fracturing of Yugoslavia, demonstrates
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A) nationalism declined as a potent force with the formation of the European Union.
B) the difficult ethnic tensions that emerged as peoples adapted to a communist society.
C) Italy's and Greece's rising role as the peacekeepers of Europe.
D) post-World War I diplomats did not entirely understand ethnic divisions in parts of eastern Europe.