How did the progressive movement address the issue of child labor?

The supreme court ruled that slaves could not sue because they could not read. they could not become lawyers. they lived in southern states. they were not considered citizens.

In ohio in 1872, the cleveland massacre was a)a violent labor dispute at standard oil refineries in cleveland. b)a takeover by standard oil of the refineries in cleveland. c)an attempt to stop standard oil from becoming a monopoly. d)a failed attempt by standard oil to take over other refineries.

How did europeans and africans displace native americans in north america’s predominant peoples?