Which system has the main function of the body's defense?

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.

How did europeans and the introduction of european goods and ideas change native life ?

The main reason that the royal society of london developed the modern form of peer review was to: award grant funding. decide on promotions for researchers. streamline the publication of conference proceedings. control the quality of published papers.