I believe the answer is Religion
C is your answer it let communist countries under the USSR to transition over to Capitalism
Answer:
The Columbian Exchange: goods introduced by Europe, produced in New World. As Europeans traversed the Atlantic, they brought with them plants, animals, and diseases that changed lives and landscapes on both sides of the ocean.
Explanation:
A war of attrition.
World War 1 is an example of this.
<span>Great Britain did no receive any land in Europes mainland during the Congress of Vienna. The country did however, receive considerable holdings in the new colonies. The rest of the nations in the Congress of Vienna, received at least some portion of land in Europe.</span>