Answer:
Check the explanation
Step-by-step explanation:
US has a comparative advantage in producing rice.
This means US's opportunity cost of producing rice is less than that of Korea.
Korea's opportunity cost of producing rice will be given as:
For producing 9 units of Rice, Korea gives up 5 cars.
For producing 1 unit of rice's, Korea will give up 5/9 units of car.
Kindly check the image below.