Answer:
John Quincy Adams, Rutherford B Hayes, Benjamin Harrison, George W. Bush, and Donald Trump
Explanation:
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The peaks and valleys of the Rocky Mountains.
They were isolated for 2 basic reasons.One was the hilly geography of Greece,
this natural setting spawned several isolated communities.Then the second reason was because that these communities grew into city-states with the dominant community ruling the smaller ones
Better educated workforce, greater occupational specialization, better matching of skills with jobs, and higher overall economic productivity. Immigration