Answer:
It lists the laws of the country and gives states the power to enforce them.
The answer is A: <span>In the 1990s, most immigrants to the United States came from Asia and the Americas.
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The Congress of Vienna was convened in 1815 by the four European powers which had defeated Napoleon. The first goal was to establish a new balance of power in Europe which would prevent imperialism within Europe, such as the Napoleonic empire, and maintain the peace between the great powers
