Name a good or service that the U.S, exports that you believe is an example of U.S. firms' comparative advantage. a. Explain where you believe that comparative advantage comes from. Do you believe the comparative advantage is best explained by factor conditions, domestic rivalry, or network externalities from related and supporting industries? ! 5. b. Explain how the Product Life Cycle Theory applies to the good or service you chose, and which country(ies) you believe will be the future exporters of this product. t