The Demand and Supply Curves Shown Below Apply to a Competitive

The demand and supply curves shown below apply to a competitive market for a factor in the production of widgets. FIGURE 13- 5
-Refer to Figure 13- 5. This factor market is in equilibrium at point B. If a technological change occurs in the production of widgets that allows for increased production from each factor, then

A) economic rents to the initial 40 units of the factor will decrease.
B) total factor earnings will rise and economic rent to the 40th unit will be zero.
C) total factor earnings will decrease and economic rent to the initial 40 units will increase.
D) equilibrium will move toward point D and the factor price will rise.
E) equilibrium will move toward point C and economic rent to the initial 40 units will increase.