Concept:OPEC coordinates petroleum policies to control and stabilise international oil prices.
Explanation:OPEC means the Organisation of the Petroleum Exporting Countries.
It acts as a cartel that brings major oil-producing nations together.
Its main goals are to unify petroleum policies, ensure regular supply, and stabilise oil prices.
By setting production quotas, OPEC directly influences the price of oil in the global market.
IMF deals with monetary cooperation, ECOWAS is a West African economic bloc, and OAU is a continental political body. None of them fixes oil prices.
Answer:OPEC — Option C.