PLS HELP What was the main issue of concern in the 1800s between the federal and state governments? A.) ownership of land in the west B.) National verse state banks C.) control over slavery D.) trade between states

c

Explanation:

The acquisition of thousands of square miles of new territory only exacerbated the political crisis in Washington over whether slavery would be allowed there. A group of Northern Democrats attempted to prohibit the spread of slavery into the formerly Mexican lands but fell short of votes in the United States Senate. The issue of slavery’s expansion was at the center of the presidential campaign of 1848, and the Free Soil Party, a new antislavery party, polled more than 9 percent of the vote. Politicians in Washington made a final attempt at a compromise in 1850, passing legislation that admitted California as a free state while at the same time enacting a stronger fugitive slave law to appease Southerners.

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it affected it because the kingdoms (with trade) slowly got richer and richer.