Answer:
The correct answer is A) The invention of a steel tipped plow and a reaper
Explanation:
The invention of a steel tipped plow and a reaper helped the farming industry to develop in the west.
While it seems like an ordinary tool by modern standards, the steel tipped plow was a revolution in it's day. Being strong and sturdy, it greatly improved the efficiency of ploughing and farming.
Before Steel, most people used hard wood plow which were expensive, easily damaged and not very efficient.
