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1. which statement is NOT true
2. why did immigrants avoid the south
4. where was the frontier in the 1850s
5. why was the us population center along the 30th parallel
6. where did most antebellum immigrants come from
7. data show immigrants were mostly
8. what was the impact of immigration on average income
9. what other impact did immigration have
10. how many americans live in urban areas today
11. main push factor behind domestic migration
12. main pull factor behind domestic migration
13. when was the frontier officially closed