Which of the following was NOT a result of the industrial revolution

1. A decrese in child labor
2. Pollution
3. The use of clocks
4. A decrease in the middle class

The answer according the book is #1 except I am confused all the child labor laws came in. I thought it was # 3. Can anyone help me understand.

1 answer

Children were hired to work in mines and factories during the industrial revolution starting around 1800. However, child labor laws weren't enacted until after 1900.

So 1 is the correct answer.