What affect did the spread of islam have on the slave trade

Which fact would this be, and how might you verify the truth?

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.

Why is the sons of liberty a difficult group to describe ?