Suppose the demand and supply curves in the market for apples have the following functional? form: QD? = 250 -4p and QS? = 10? + p. If the prevailing market price is? 40, then
A. the market exhibits an excess supply of 50 units.
B. the market exhibits an excess demand of 50 units.
C. the market is clearing.
D. the market exhibits an excess demand of 40 units.
E. the market exhibits an excess supply of 40 units.