In Vietnam, one person can produce 90 kilograms of rice or 30 shirts in one year. In Cambodia, one person can produce 100 kilograms of rice or 50 shirts in one year. What is the result in terms of the production of rice? a. Cambodia has a comparative advantage in the production of rice. b. Vietnam has a comparative advantage in the production of rice. c. Cambodia has both an absolute and comparative advantage in the production of rice. d. Vietnam has an absolute advantage in the production of rice