Back when the Industrial Age was in motion many workers were hurt on the job, but keep working because they didnt get any money if they did not work. This lead to the contamination of products such as meat and other food items. Also children began to work back then as well and when mothers learned that thier children were getting hurt they demanded money to pay for the cost of medical bills.
Answer:
im not very smart but i think b or c
Explanation:
The density, of a substance is its mass per unit volume. basically is mass so its one of the two. i hope i helped! <3
