Whose inventions changed American agriculture on the prairies of the Midwest?

Cyrus Reaper and Robert Plough

Thomas Jefferson and Eli Whitney

Cyrus McCormick and John Deere

Elias Howe and Linus Yale

Cyrus McCormick and John Deere

Explanation:

Cyrus McCormich and John Deere invented machines that made possible the large scale farming in the mid east, and this were the steel plow and the reaper, the steal plow was basically a blade that could be pulled by a donkey, a bull or a horse and it made easier the removing of the land to plant a seed.

I believe cyrusmccormick and john devere