Answer:
United States
Explanation:
A comparative advantage results when a country's opportunity cost of producing good X is lower than the opportunity cost of producing good X in another country.
France
Opportunity cost of producing wine = 30/40 = 0.75 kilos of cheese
Opportunity cost of producing cheese = 40/30 = 1.33 bottles of wine
United States
Opportunity cost of producing wine = 12/12 = 1 kilo of cheese
Opportunity cost of producing cheese = 12/12 = 1 bottle of wine
France has a comparative advantage in the production of wine, and the US has a comparative advantage in the production of cheese.