What is the main idea of this passage?

when i was a surgeon in the infirmary, accidents were very often admitted to the infirmary, through the children's hands and arms having being caught in the machinery; in many instances the muscles, and the skin is stripped down to the bone, and in some instances a finger or two might be lost.

–dr. michael ward, testifying before england's
parliament in 1819

children often suffered severe injuries from working in factories.

few children were injured while working in factories.

parliament made laws that keep children safe.

children worked long hours in the factory and received little pay.

answer is

Option(A)

Children often suffered severe injuries from working in factories

Explanation:

We are given in the passage that when the writer was a surgeon, many accident cases of children having skin stripped down to bone or fingers being lost by working with machineries have been admitted in to the infirmary.

Thus it clearly means that these children worked in factories with machines and suffered severe injuries from working is the statement inferred from it.

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explanation:

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while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.