The correct answer is - B. Machinery often replaced human workers.
The fact that the machinery was replacing human workers made Western European economies have huge advantage over the other countries. This meant that for producing the same good less people were needed now, so more and more industrial sites were opening up, and the same amount of people was needed to satisfy the labor force for much bigger production. The machines allowed that the manufacturing is much quicker and efficient, and less effort and human labor was needed. This made the economies of the Western European countries skyrocket and dominate the world.
