Answer:
A. Interchangeable parts made mass production easier and cheaper.
Explanation:
The slavery in the North never reached the same number and
intensity of the slavery in the South. The controls and tactics of the
slaves were less severe than that of the South, though there were slaves who
played key roles in the eve of the revolution at different parts of America. Though
in the North, the slave population decreased faster than that of the South.
In this excerpt, the word tension means discomfort. Dr. King is saying that a certain level of discomfort is necessary for growth as a country. The group(s) that have been oppressing the black community are to expect nothing short of discomfort. Facing difficult emotions is the only way that we, as a community, can make any sort of change.
The Fifth Amendment limits the power of eminem domain
It decided that the "once free always free" was no longer valid and did not need to be honored and Dred Scott and his family would remain slaves until freed by their masters. It became one of the main causes of the American Civil War.
Hope this helped!