Let us define the real wage as the purchasing power of one hour of labor. In the Ricardian 2X2 model, if two countries under autarky engage in trade then  
A) the real wage will not be affected since this is a financial variable.  
B) the real wage will increase only if a country attains full specialization.  
C) the real wage will increase in one country only if it decreases in the other.  
D) the real wage will rise in both countries.  
E) None of the above.  
Answer:  D

觉得应该选B，请知道给指导下。