Which situation is an example of comparative advantage in an international market? Country A decides to grow extra potatoes so they have more to export, while Country B does not. Factories in Country A can produce the same number of tablets as factories in Country B, or the factories in Country A could be used to build more laptops than the factories in Country B. Country A invests in a new technology while Country B chooses to invest in education. Farmland in Country A can produce 100 units of rice per acre, while Country B can only produce 70 units of rice using the same amount of workers and farmland.