Refer to the figure above. At a price of $9, the market will experience _ in the amount of _ units.

Refer to the figure above. At a price of $9, the market will experience _ in the amount of _ units.
A.equilibrium; 4 units
B.excess supply; 5 units
C.excess demand; 5 units
D.excess supply; 6 units
正确答案：excess supply; 5 units