The Organization of Petroleum Exporting Countries (OPEC) is an example of a? by Sunday | May 25 | 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…A major achievement of the Organization of Petroleum…One objective of the organisation of petroleum…Which of the following roles is being played by the…The organisation of petroleum exporting countries…