In a closed primary you can only vote for someone in your registered party. In an open primary anyone can vote for any candidate in either party regardless of whether they are registered democrat or republican
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Reaper and steel plow were the machines invented by Cyrus McCormick and John Deere that made large-scale agriculture possible, especially on Midwestern prairies.
B) Reaper and steel plow
<u>Explanation:</u>
In the 1800's people used to do all the chores with their hands hence, it made farming a tough job and a lot of time consuming activity. During the industrial revolution, Cyrus McCormick invented a mechanical reaper, which would help reap big farms in very less time.
The steel plow played a very important role in the industrial revolution as the wooden plow used to be weak but John Deere's invented steel plow was strong and broke soil easily.
Agriculture changed the way ppl lived resulting in them not having to work as much. When ppl figured out they could grow crops and not have to hunt for food it saved them energy and was more convenient.