Answer:
Law
Step-by-step explanation:
According to the law of comparative advantage, a country has comparative advantage in production if it produces at a lower opportunity cost when compared to other countries.
For example, country A produces 20kg of beans and 10kg of rice. Country B produces 10kg of beans and 20kg of rice.
for country A,
opportunity cost of producing beans = 10/20 = 0.5
opportunity cost of producing rice = 20/10 = 2
for country B,
opportunity cost of producing rice = 10/20 = 0.5
opportunity cost of producing beans = 20/10 = 2
Country A has a comparative advantage in the production of beans and country B has a comparative advantage in the production of rice