What was a common role of working children in urban centers during the period of
industrialization?
a. they would their parents operate small businesses and learn the
family trade
b. they would go into small spaces of the machines in factories that adults
could not reach
c. they were used to translate messages from their parents' managers into
english
d. they would participate in a work-study program where they went to school
and did paid labor

B. They would go into small spaces of the machines in factories that adults could not reach.

Explanation:

During the Industrial Revolution, child labor became more and more common.  Big industries and factories often employed children because they were paid less than adults.  The textile industry was one of the biggest ones that relied on a certain amount of child labor.  Children would carry out many kinds of tasks that often included things like going into small spaces where adults couldn't reach or fit.

during the hitler era and it caused them to declare war on germany