Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :
Table 7A-1
-If point D is the least-cost factor combination for Q = 100 when the price of labor = $5 and the price of land = $4 for Table 7A-1, what is the (marginal productivity of labor) /(marginal productivity of capital) ?

A) 1
B) 1.25
C) 1.5
D) 2
E) It cannot be determined from the information given.