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D. Ricardo's theory of international trade is based on the following preconditions {mark correct answers i: a. free trade free costs of production absence of international labor mobility presence of transportation costs technical progress full employment there is only one factor of production {land} arr-cane This model of international trade regards an aggregate demand and aggregate supplyr of goods. The offer in the market is characterized by the marginal rate of transformation. IWhat is this model? a. standard model b. the technology gap model c. product life cycle model d. representative demand model a. scale model f. latte-industry; model The minimum of state interference in foreign trade, which is developed on the basis of free market forces of supply and demand, is understood under a. industrial protectionism a. collective protectionism c. free trade policy d. hidden protectionism