<span>the correct option is C
</span><span>borders created by imperialist nations have led to modern ethnic tensions
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Modern ethnic tensions were caused by the scramble for and partition of the various spheres of influence often putting often hostile communities into one border, or separating these communities into different states, therefore diminishing their political importance.
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Answer:
The United States had more people in the territory than Britain and the United States was not looking for war with Britain when Mexico was ready to fight.
