Which three major factors contributed to the roman empires decline?

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.

Who's idea was it for businessmen to use their wealth for the greater good of society? (gospel of wealth ~ap u. s. history

Which of the following areas are best suited for livestock ranching