Awrinkle in time what is the thing and which historical figures have opposed it

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 france’s tax policies contribute to the french revolution?

What industry was exempt from the child-labor laws passed in the factory act of 1833?