Question

while industrial production increased free labor opportunities in the north, this invention actually resulted in an expansion of slave labor in the south. telegraph steam ship cotton gin spinning jenny

Explanation:

The cotton gin, invented by Eli Whitney, made cotton - processing more efficient. This led to a higher demand for cotton in the South, which in turn increased the demand for slave labor to grow and harvest more cotton. The telegraph was for communication, the steam - ship for transportation, and the spinning jenny was a textile - related invention in Britain not directly linked to the expansion of slave labor in the American South.

Answer:

C. cotton gin