Answer:
D. There was no more frontier land
Explanation:
This is the answer because the 1890 census said that the frontier region of the United States no longer existed which means there was no more frontier land.
Hope this helps!
<span> Years: 1580 to 1640 is when they suffered</span>
1. True
3. False
(I dont want to give you any answers that I'm unsure about, so I didnt answer the rest)