9. Suppose English workers earn twice the wage rate earned by Irish workers. Comparing their labor markets graphically, how can you explain that wage rate differential?

a. The MPP curve for Irish workers lies below

(closer to the origin) the MPP curve for English workers.

b. The supply curve of labor in England lies below the supply curve of labor in Ireland.

c. The demand curve for labor in Ireland lies above (out to the right of) the demand curve for labor in England.

d. Prices of all goods are higher in Ireland than they are in England.

e. There is greater use of technology in Ireland than in England.