Why Were Regional Identities Formed in the U

Why were regional identities formed in the U.S.in the early nineteenth century?

A) Without telephones, radios, televisions, or Internet, people were isolated and knew little of the happenings in other regions.
B) Most regions had aggressive devotion to radical democracy, making the other regions uneasy.
C) In order to control immigrant migration, the federal government designated certain areas for immigrants from certain countries to live.
D) The industrial revolution increased European immigration; immigrants tended to migrate to cities to live near people from their country of origin.
E) People wanted to defend local economic interests, it was difficult to travel far, and there were distinct regional subcultures.