Which best defines history?

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.

Answer the questions in the image for brainliest

Choose the right phrase to complete the sentence. segregation in the united states in the late 1800s and early 1900s was supported by law alone. by custom alone. by both law and custom.