What two dangers did washington say

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.

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries

How did europeans and africans displace native americans in north america’s predominant peoples?