Which of the following is not an objective of the Organization of Petroleum Exporting Countries (OPEC)?

The objective of the Organization of the Petroleum Exporting Countries (OPEC) is to stabilize and coordinate the prices of crude oil in the global market. This is done by regulating the supply of oil among its member countries and ensuring that the prices of oil remain at a level that is fair and sustainable for both the consumers and producers. Therefore, the option that is not an objective of OPEC is "Stagnation of developed economies". OPEC's main focus is on managing the supply of oil and ensuring that prices remain stable and fair, rather than deliberately trying to hinder the growth or development of any particular economy.