How was rockefeller able to build his monopoly across the oil industry?
a) he bought up oil refineries, cut costs, and reinvested his profits in other refineries.
b) he confined his business to ohio so he could buy all the refineries there.
c) he found newer and cheaper ways to refine oil, increasing his profits.
d) he began to sell kerosene as well as oil, expanding his market.

Rockefeller was able to build his monopoly across the oil industry since he bought up oil refineries, cut costs, and reinvested his profits in other refineries.

Rockefeller was an American oil industry business magnate, industrialist, as well as philanthropist. He is widely regarded to as the wealthiest American of all time, and the richest person in modern history.

Rockefeller's wealth sky rocketed as kerosene and gasoline grew in importance, and he turnt into the richest person in the country, controlling 90% of all oil in the United States at his peak.

This Question has 3 parts so I am going to answer then all right now.

1) He bought up oil refineries, cut costs, and reinvested his profits in other refineries.

2) To grow his corporation, Rockefeller designed a new type of company called a TRUST

3) A trust is a large company or combined businesses that together control a specific market

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

do but i don't go there

explanation:

btw this is in middle school stuff lol