Answer 1:
The Concert of Europe refers to a general consensus among the Great Powers of 19th-century Europe to maintain the European balance of power, political boundaries, and spheres of influence.
Answer 2:
The old traditional empires stretched over continents gave way in Europe to the nation-state. Change was coming.
Brazil getting coffee was a result of the Colombian exchange so your answer would be B
Boston Tea Party and the Townshend Acts