Answer:
The United States prides itself on being a nation of immigrants, and the nation has a long history of successfully absorbing people from across the globe. The successful integration of immigrants and their children contributes to economic vitality and to a vibrant and ever-changing culture. Americans have offered opportunities to immigrants and their children to better themselves and to be fully incorporated into U.S. society, and in exchange immigrants have become Americans—embracing an American identity and citizenship, protecting the United States through service in its military, fostering technological innovation, harvesting its crops, and enriching everything from the nation’s cuisine to its universities, music, and art.
In order for a nation to exist: It must be sovereign and handle it's own affairs. Hope that helps.
Well, I don't know what D is but I think it might be: <span>African slaves were needed in the Americas to replace the rapidly declining population of native people.
If that's the case C and D are correct.
Hope this helps :)
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