9) the most important reason for the growth of labor unions in the latter half of the 19th century was a) the passage of the sherman anti-trust act. b) the creation of the interstate commerce commission. c) the forceful leadership of the newly arriving immigrants. d) the way the workers were treated by big business and big industry.

D) They way the workers wre treated by big buisness and big industry/

don't know but i know the moderators know how to. : (

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.