HELP NEEDE What impact did Cyrus McCormick's reaper and John Deere's steel plow have on agriculture?

They reduced the need for slaves on southern plantations.

They allowed small farmers to keep up with large landowners.

They made large-scale agriculture possible and profitable.

They opened up more of New England to farming.

Answer and Explanation:

I believe They made large-scale agriculture possible and profitable.

The 3rd option

i really do want to but i just don't know it i'm so sorry : (

president thomas jefferson hoped that the embargo act of 1807 would the united states by demonstrating to britain and france their dependence on american goods, convincing them to respect american neutrality and stop impressing american seamen. instead, the act had a devastating effect on american trade.