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 grow potatoes to export. Factories in Country A and Country B produce the same number of tablet computers. Country A's factories could be used instead 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. Country A can produce 100 units of rice per acre of farmland, while Country B can only produce 70 units of rice per acre of farmland using the same resources