Which of these events occurred during the era of the superpowers (the cold war)?
a) the rise of imperialism in western europe
b) free trade among the countries of north america
c) attacks by muslim extremists on the united states
d) the presence of communist governments in the western hemisphere

What effect did john hay’s open door policy letters have on the imperial powers of britain, france, germany, russia, and japan? a. it provoked the imperial powers to declare war on the united states. b. it caused the imperial powers to restrict trade in their trade with china. c. it warned the imperial powers that the united states would soon declare war on china. d. it signaled to those powers that the united states would take a larger role in world affairs than before.

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

The irish and germans of the 1840's were part of the new immigration. true or false