Please answer the following questions about cartels and the specific case of OPEC Which of the following is generally true of cartels? Which of the following is true of OPEC? Cartels usually raise prices by expanding output Cartels never stick to their agreed-upon quotas. Cartels collude to raise prices and profits OPEC includes only nations from the middle east. OPEC sets production quotas in order to restrict supply Saudi Arabia is an occasional and minor player in OPEC. The United States is a leading member of OPEC In the U.S.,cartel members can legally meet to set prices.