Answer: B. the spread of slavery into the West.
Explanation:
It was an established fact in the years leading up to the Civil War that the South was pro-slavery and the North was Anti-slavery and so both sides had arguments about the spread of slavery into the western territories as those territories gained statehood.
The South wanted slavery to spread into the territories so that they would have more states which would give slavery more representation in Congress and therefore keep the practice going. The North wanted the territories to be free for the same reason.
Technology or another type of source
The conservative revolution was triggered because of social unrest in high taxes and the concern of using nuclear weapons as a military option. They became popular because the people are rallying for their civil rights and welfare. Millions of people were mobilized because of these issues.
The Battle of Lexington.
This battle was officially the first battle the redcoats and minutemens fought each other. The minutemen were less well trained, and overnumbered, and so lost to the better trained larger group of British troops
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In the first major pioneering movement, settlers made their way to Oregon and California by way of the "Oregon Trail", which was also where many settlers would meet with relatives.
