What one event led to a rapid increase in the number of slaves in the south? the start of the civil war the invention of the cotton gin the missouri compromise of 1820 the removal of immigration quotas

the invention of the cotton gin

Explanation:

The cotton gin refers to a a machine that sets aside cotton fibers from their seeds. Therefore, the invention of the cotton gin transformed the cotton industry in the United States and demanded cheap labor force, which led to the rise of slavery in the South and to the American Civil War later.

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