Answer:
B. managing competition between nations.
Step-by-step explanation:
International economic organizations like the International Monetary Fund, the World Bank, and the World Trade Organization are important because they help manage competition between nations, and ensure a more or less stable global economic climate in which nations can engage in trade relations more easily.
The World Trade Organization is the best example of this because it sets the minimum standars for nations to engage in trade, helping like this a further integration of the world economy.