If a market is in equilibrium and demand increases while supply decreases, the change in the equilibrium price is _ and the change in the equilibrium quantity is _.

If a market is in equilibrium and demand increases while supply decreases, the change in the equilibrium price is _ and the change in the equilibrium quantity is _.
A.indeterminate; positive
B.positive; indeterminate
C.positive; negative
D.positive; positive
正确答案：positive; indeterminate