Final answer:
Post 'World War 2' is characterized by Communism, NATO, Supranationalism, and Greying Population, but not by Russification, which was a localized policy not representative of the global post-war era. The correct answer is option D.
Step-by-step explanation:
The period post "World War 2" is characterized by several distinct developments except for Russification. The options provided describe elements that were emerging or prevalent after the war, but Russification specifically refers to the policy of the Russian Empire and later the Soviet Union to impose Russian culture and language on non-Russian areas, which isn't a broader characteristic of the global post-war era.
The Cold War era featured the spread of Communism, the formation of defensive alliances such as NATO, the concept of Supranationalism as seen in the European integration efforts, and the demographic shift towards a Greying Population in many developed countries. However, Russification was a more localized policy and not a global characteristic of the post-World War 2 era.