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.