The period from 1820 to 1860 was marked by a growing sense​

Two Great changes of the Era 1820-1860 which revolted to

1.) Industrial Revolution-(The growth of mechanization of industry)

2.) Market Revolution-(Market Revolution

- The dramatic increase between 1820 and 1850 in the exchange of goods and services in market transactions.

- Resulted from the combined impact of the increased output of farms and factories, the entrepreneurial activities of traders and merchants, and the development of a transportation network of roads, canals, and railroads)

- Not all Americans shared in the new prosperity.

- Created a class divided society (labor class and upper class).

- Challenged the founder's vision of an agriculture republic with few distinctions of wealth (Thomas Jefferson).

Creo que es A =) ss

Explanation: