The correct answer is A) Children often suffered severe injuries from working in factories.
The main idea of this passage is "Children often suffered severe injuries from working in factories."
That was an exact description by Dr. Michael Ward, who testified before England's Parliament in 1819. The Industrial Revolution had brought many benefits and advantages to England but on the negative side, workers had low wages, worked under unhealthy conditions and were not trained to perform their work safely. The worst part was employers used children because they paid children even lower salaries, generating many accidents as the ones described by Dr. Ward.