Which of the following was an advantage held by the north during the civil war?
a) northern whites believed in the cause of ending slavery.
b) the north had more natural resources
c) the north was fighting to defend itself.
d) the north had superior military leaders.

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