Technological development led to an increased demand for slaves in the united states during the early- to mid-1800s? a) the steel plow b) the cotton gin c) the mechanical reaper d) the combine harvester

What were the purposes of salt? check all of the boxes that apply. -to achieve peace -to protect the security of the united states -to form an alliance against communist nations - to stop the nuclear arms race - to give the united states an advantage over the soviet union