What would best explain the increased totals for all cars made in the 1920s?

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 of the following associations is incorrect? a. franklin d. roosevelt-social security b.theodore roosevelt- conservation of natural resources c. franklin d. roosevelt- the panama canal d.theodore roosevelt-the russo-japanese war

What was the purpose of the federal reserve system