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