Since the End of the Cold War

Since the end of the Cold War,

A) Russia has become a nation-state, with the expulsion of minorities from regions such as the Caucasus.
B) military alliances have become more important in Europe.
C) nationalities have been discouraged from expressing their cultural identities, particularly in the Caucasus region and Siberia.
D) Russia has undergone political and economic turmoil, including rebellion in the Caucasus region.
E) COMECON has reemerged as a major economic entity in Eastern Europe, and has cooperated with the European Union and NATO on environmental issues and regional trade.