Agricultural Revolution inventions that decreased the need for laborers?

those things that harvest cotton by themselves

Explanation:

they look like tractors and were able to harvest more cotton faster

answer:   c. the drafting of common sense

explanation:

d) a week

because the land run of 1889, although not without precedent in the history of the west, further, their men were aboard the first trains, ready to jump off and begin staking their claims. oklahoma city, edmond, and guthrie were all so affected.