In the early 1800s, why was there so little settlement on the great plains?

During wwi, literacy tests were used to control immigration, which marked a return of what type of ideology in some americans?

How did the beliefs of the roman catholics differ from the eastern orthodox form of christianity?

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.