What was the effect of the invention of the cotton gin on the united states in the first half of the nineteenth century?

: the focus of economic activity in the south shifted from agriculture to industrial production.

: the south became more dependent on slavery, deepening the differences between the south and the north.

: industrialists from the north migrated to the south in large numbers to set up textile mills and shipping firms.

: large numbers of plantation workers in the south lost their jobs and moved north in search of jobs.