It is A. I googled all of them and A is the only one that didn't have stories written about it.
It was problematic because a large number of tribes supported Britain in the war so now that the Colonies were free it was up to them to have diplomatic relations with the natives that fought against them. The Natives weren't even invited so any territorial acquisition that occurred was done without them and they lived on those territories.
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Answer: The annexation of Hawaii
Explanation:
Why is equality considered to be a centerpiece of American democracy?
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D) barrier-free participation in government is needed for a democracy to work effectively.
Hope I helped!