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