Which country established itself as the leading power in the Americas?

Britain

Explanation:

Britain and the Thirteen Colonies After the conclusion of the Seven Years' War in 1763, Britain had emerged as the world's dominant power, but found itself mired in debt and struggling to finance the Navy and Army necessary to maintain a global empire.

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we can argue that appeasement caused world war ii because it allowed hitler and the nazis to build germany’s military power until it was strong enough to fight a major war. additionally, appeasement emboldened germany, making it think the allies would never have the will to fight. this made germany much more aggressive and encouraged it to take the steps that eventually led to war.

the answer is b. i did this test and got it right.