What was the result of the expansion of slavery from 1800 to 1850

In the period between 1800 and 1850 America experienced a marked change in national unity. Territorial expansion had a large effect on national unity in this period. Territorial expansion boosted national unity between 1800 and 1823, but it degraded national unity between 1824 and 1850.

Explanation:because

d. hip hop

it was originated in the 70s while the harlem renaissance occured in the 1920s