Answer: Option (D) is correct.
Step-by-step explanation:
Correct option: A nation cannot have a comparative advantage in the production of every good.
A country has a comparative advantage in producing a commodity if the opportunity cost of producing that commodity in terms of other commodity is lower than the other country.
While calculating the opportunity cost of producing a commodity, country takes into account both the commodities. Hence, it was not possible that a country is having comparative advantage in the production of every commodity.