Answer:
The correct answer are numbers (1) and (3): The WTO attempts to minimize barriers to trade; The WTO assesses complaints of unfair trading from member countries.
Explanation:
The World Trade Organization (WTO) is a treaty created to promote fairness in international trading with a more participative role among the country members. The WTO replaced in 1995 the General Agreement on Tariffs and Trade (GATT) which was created under the same purpose- Among the main WTO goals, we can identify setting lower barriers to promote international trade and ruling unfair trading when it occurred.