Answer: Opportunity cost would be your answer :)
Step-by-step explanation:
A country has comparative advantage in producing a certain good if the opportunity cost of producing that good is lower than in the other country. Ricardo observes that an absolute advantage does not necessarily imply a comparative advantage. As long as the relative cost of production is different in the 2 countries, comparative advantage exists.
Comparative advantage refers to a country's ability to produce a specific good or service at a lower opportunity cost than its trading partners. Opportunity cost measures a trade-off by representing the potential benefits an investor, business or individual misses out on when they choose one alternative over another.