How did the land that is now california, nevada, and utah become part of the united states?

Which of the following best describe southern society in the early mid 1800s

How did many delegates from northern states at the constitutionalconvention view slavery?

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.