The Treaty of Ghent was the peace treaty that ended the War of 1812 between the United States of America and the United Kingdom of Great Britain and Ireland. Both sides signed it on December 24, 1814, in the city of Ghent, Belgium.
The answer is: Cities
Approximately, around 80% of united states population live in the cities. This happen because most of job opportunities that exist in united states (whether it's art, technology, or manufacturing) are located in the cities.
Because of this, even people who born in rural areas start to move to inner cities in order to find jobs and sustain their living.
A. Piedmont but I’m not sure so wait for someone else to answer