Answer:
B. comparative advantage
Step-by-step explanation:
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 20 kg of beans and 5kg of rice. Country B produces 5kg of beans and 20kg of rice.
for country A,
opportunity cost of producing beans = 5/20 = 0.25
opportunity cost of producing rice = 20/5 = 4
for country B,
opportunity cost of producing rice = 5/20 = 0.25
opportunity cost of producing beans = 20/5 = 4
Country A has a comparative advantage in the production of beans and country B has a comparative advantage in the production of rice