What 3 nations mentioned in the lecture used african slaves in the americas?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

Which one of the following statements best characterizes change to agriculture in the united states since 1900

Complete this history worksheet . answer as many questions as you can.