The answers are B and A this is because although the plations where significant they need actual African slaves in order to even have a plantion
Answer:
The second one.
Numb. of blue/Numb. of tot spheres
<span>strikes by labor unions usually gained public supports
</span>
Cyrus McCormick in 1831. This machine was used<span> by farmers to harvest crops mechanically. For hundreds of years, farmers and field workers had to harvest crops by hand using a sickle or other methods, which was an arduous task at best</span>
