During the Industrial Revolution, how did innovations in technology affect the use of slave labor in the United States?

Innovations in agricultural technology increased the production of cotton. As a result,
Southern plantations needed greater numbers of enslaved workers.

Innovations in agricultural technology meant that fewer workers were needed on
Southern plantations. As a result, the demand for slave labor decreased.

Innovations in manufacturing technology increased production in Southern factories. As a result, immigrants worked alongside enslaved workers.

Innovations in manufacturing technology increased the output of industry in the North. As a result, factories increased their use of slave labor.