Question

what were the machines invented by cyrus mccormick and john deere that made large - scale agriculture possible, especially on midwestern prairies?

○ reaper and steel plow

○ planter and harvester

○ tractor and baler

○ silo and corn crib

Explanation:

Cyrus McCormick invented the reaper, and John Deere invented the steel plow. These inventions were crucial for large - scale agriculture on midwestern prairies. The other options: planter and harvester are not the specific inventions of these two; tractor and baler were developed later and not by them; silo and corn crib are storage structures, not the machines in question.

Answer:

A. reaper and steel plow