126) Describe the purpose, roles, and achievements of GATT and the World Trade Organization. 127) Companies that go global confront several major risks. Describe three of these risks. 128) Compare and contrast a tariff and a quota. 129) Briefly explain why economic communities are formed. 130) Briefly explain why the European Union could be considered a threat to U.S. marketers that want to do business in Europe. 131) Describe the political-legal factors that a company should consider before deciding to conduct business in a foreign country.