Final answer:
The most important benefit for countries that are members of the WTO is that it enforces trade agreements, facilitating smoother and more predictable international trade relationships.
Step-by-step explanation:
If you are asked to select the most important benefit for countries that are members of the World Trade Organization (WTO) from the list provided, the correct answer would be: a. WTO enforces trade agreements. The WTO plays a critical role in international commerce by ensuring that trade agreements are followed and that all its member countries are treated equitably under these agreements. This enforcement helps reduce trade barriers, facilitating smoother and more predictable trade relations among nations. Furthermore, the WTO provides a platform for member countries to negotiate and resolve trade disputes in a structured and legally binding manner.
Answering the rest of the choices, b. WTO supports the use of tariffs for non-economic use is incorrect as the WTO often works toward reducing tariffs and other trade barriers. c. WTO is not helpful for developing countries isn't accurate as the WTO includes provisions to assist developing countries. d. WTO is a very fast way to resolve disputes between WTO members might be misleading since the dispute resolution process can be complex and time-consuming, even though it is structured. Lastly, e. WTO will enforce a member country's trade policies on non-member countries is not true because the WTO only manages trade policies between its member countries.