Which of these best supports o'sullivan's claims? a)the civil war
b)the war of 1812
c)the annexation of texas
d)the industrial movement

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.