20. Based on the above figure that shows..-阿摩線上測驗
20. Based on the above figure that shows the pre-trade PPFs for the nations of Utopia and Apogee, when trade begins between Utopia and Apogee, it will be profitable
I. for Utopia to export cars.
II. for Utopia to export trucks.
III. for Apogee to export cars.
(A) I and III
(B) I only
(C) II only
(D) II and III