Answer: C skilled Human Labors
Explanation:
They needed more quality than quantity. Most of the Industrial Revolution relied on many factories, so they needed many people. That would eliminate A, as they took almost everyone (including woman and children, which didn’t necessarily have practical skills then.)
They heavily relied on new machines, such as the Cotton Jin or textile mills as a whole. This eliminates D.
They also used water as a source of power now, so that can eliminate B
