Refer to the figure above. Assume that column A and column B are the initial demand and supply curves. At a price of $30, the market would experience:

Refer to the figure above. Assume that column A and column B are the initial demand and supply curves. At a price of $30, the market would experience:
A.excess supply of 45 units.
B.excess demand of 45 units.
C.excess demand of 95 units.
D.an equilibrium.
正确答案：excess demand of 45 units.