Respuesta :

roughly 1.7 million children worked in factories by 1900 

Answer: 1.7 million

Explanation:

In the early 1900s, children frequently worked in factories. Some of them started working at the age of 5. They worked for long periods of time and in the worst conditions.The North had stricter laws regulating child labor so, many factories moved to the South so they could continue employing children.