The overall purpose of the conferences at casablanca (january 1943), teheran (november 1943), yalta (february 1945), and potsdam (july 1945) was to
a)
devise a solution to stop the holocaust.
b)
design an atomic bomb to end world war ii.
eliminate
c)
plan the allied victory against axis forces.
d)
create a plan to drive mussolini from africa.

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.