Help me match these please

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.

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps

Brainliestttme : describe the following event: increase in islamic extremism in the middle east