Which of the Following Is an Example of an Oligopoly

Multiple Choice

Which of the following is an example of an oligopoly?

A) Oil producers restrict global oil supply in order to prop up the price of oil.
B) The automobile industry in the 1970s was dominated by four or five large firms.
C) Taiwan spurs exports to developed countries by subsidizing certain popular industries.
D) Mexico attempts to become self-sufficient by erecting trade barriers and developing domestic industry.
E) Cotton farmers receive large amounts of subsidies from the U.S.government.