Exhibit 11.9 -Refer to Exhibit 11.9,which Shows the Demand and Supply Curves

Exhibit 11.9

-Refer to Exhibit 11.9,which shows the demand and supply curves of a resource.The opportunity cost of the resource in equilibrium is represented by the area _____

A) above the supply curve and above $20.
B) above the supply curve and below $20.
C) below the supply curve and above $10.
D) below the supply curve and below $10.
E) below the supply curve and left of 10,000 units.