What Was One of the Major Changes That Took Place

What was one of the major changes that took place in American towns and cities between 1820 and 1860?

A) Western towns declined as more people moved to farms.
B) Towns grew rapidly, especially in the West.
C) River cities rose to prominence while lake cities declined.
D) Cities tended to grow up on the open plains of the West.
E) Eastern cities declined, as more people moved to the West.