They were put to work
Explanation: Before industrialism children simply helped their parents with the farms, but once factories started appearing labor was the biggest problem, so children were put to work because they could be under paid and mistreated.
they were forced to work in factories.
B. Work in factories
I got this question too, i was confused for a while but then i got it. at least i think i did, that was a long time ago.
your answer is B work in factories
schools didnt exist at that time so kids were expected to work so they could help pay for food and other needs for their family