Hey there!
This question can be asked in general, this wouldn't only relate to the past. Even now-a-days, when you see factories that are productive and they improve, as you see,this would be known to let people know that foreign immigrants and farmers. People who own these people take advantage of there talent and there non freedom
Your correct answer would be . . .
[tex]\boxed{\boxed{foreign \ immigrants \ and \ farmers}}[/tex]
Hope this helps.
~Jurgen
