Refer to the figure above. Assume demand remains unchanged at D1. If supply shifts from S2 to S1, then the equilibrium price will _ and the equilibrium quantity will _.

Refer to the figure above. Assume demand remains unchanged at D1. If supply shifts from S2 to S1, then the equilibrium price will _ and the equilibrium quantity will _.
A.rise; fall
B.fall; rise
C.fall; fall
D.rise; rise
正确答案：rise; fall