Why did manufacturers hire children to work in their factories?
1.Factory owners could pay children less money than they paid adults.
2.Children were able to complete more work than adults.
3.Children could work for eight hours per day.
4.Factory owners expected children to do demanding physical labor.
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I think 3 would be the closest answer

Explanation:

Children who worked at an early age were often not forced; but did so because they needed to help their family survive financially. Due to poor employment opportunities for many parents, sending their children to work on farms and in factories was a way to help feed and support the family.

it is the code of hammurabi