D). Vast empires.
Classical civilizations developed vast empires, whereas early river valley civilizations did not.
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Answer:
1.associations formed for mutual benefit, especially between countries or organizations~alliances
2.a ceasefire agreement, not a surrender~armistice
3.November 11, 1918, the day that the Germans and Allies signed the armistice~Armistice Day
4.a movement arising from World War I that found glory in war and exerted a radical authoritarian style often accompanied by violence~fascism
5.the policy of maintaining a large military establishment to be used aggressively at a moment's notice~militarism
6.fighting that involves an army digging long trenches at the front, from which soldiers can fight and remain protected~trench warfare
7.a form of government that recognizes no limits and no individual freedoms for its citizens~totalitarianism
Explanation:
<span>Remember, at the time, it was the Austro-Hungarian Empire. The Empire (unlike any of the other major states in Europe) was a patchwork of over a dozen major ethnic groups. Nationalism tends to organize along ethnic boundaries (that is, nations tend to form around a large concentration of one ethnic group). Thus, with a very large number of different ethnic groups, the Empire had to worry about each group wanting to split from the Empire, and form its own nation. Indeed, after WW1, this is what happened to the Empire - it was split into about a 8 different countries (or, more accurately, portions of 8 countries included lands formerly part of the Austro-Hungarian Empire).</span>