Can any body send no so that I can learn how to ppt with voiceovers

Round arches allowed the romans to create structures with

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.

Why was the land in the middle colonies attractive to immigrants