The Organization of Petroleum Exporting Countries (OPEC) is an example of a? By: Sunday|Published on: May 25|Categories: Economics WAEC| 0 comments A. perfect competition B. monopsony C. duopoly D. cartel Correct Answer: Option D D. cartel Users Also Read These:Nigeria joined the Organisation of Petroleum…The organisation of petroleum exporting countries…The five countries that established the Organization…The main problem of the Organization of Petroleum…Which of the following is not an objective of the…SEE ALSO One of the factors determining price elasticity of demand for a commodity is the?