How was rockefeller’s monopoly different from carnegie’s? a. rockefeller could gather raw materials and refine them. b. rockefeller controlled all steps in production and distribution. c. rockefeller combined many corporations into a trust. d. rockefeller had one corporation that controlled a market.

The correct answer is:  

C. Rockefeller combined many corporations into a trust.

Rockefeller´s Standard Oil company bought up his competitors, and created the US’s first monopoly. Combining many corporations into a trust meant that holders of stock from oil companies handed over their shares to Rockefeller and his associates as a board of trustees, getting in return ‘trust’ certificates which paid dividends without any power.  

which empire had the greatest influence on the history and cultural development of russia?

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.