Suppose that spain has a comparative advantage in hats and portugal has a comparative advantage in doormats. under a system of free trade, each country specializes and then trades with the other. if the price starts at four hats per doormat, and then increases to five hats per doormat, then: group of answer choices some of the gains from trade shift to spain. some of the gains from trade shift to portugal. people in portugal will not want to buy as many hats. spain no longer has a comparative advantage in hats.