By the middle of 1800, the north enjoyed which economic advantage over the south? a.) larger crops yields per acre. b.) a tighter trade relationship with europe. c.) a better transportation network. d.) lower labor costs.

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.