Refer to the figure above. If supply were to shift to the left, and demand were to also shift to the left, in the new equilibrium:

A.both price and quantity would be lower.

B.price would be higher and quantity would be lower.

C.both price and quantity would be higher.

D.quantity would be lower, but the direction of the price change cannot be determined.

正确答案：quantity would be lower, but the direction of the price change cannot be determined.