One reason for the _ slope of the demand curve is that as prices fall _.

One reason for the _ slope of the demand curve is that as prices fall _.
A.downward; more people find that the price is less than their reservation price.
B.upward; people expect goods to be of lower quality.
C.upward; more people purchase the good.
D.downward; fewer people find that the price equals their reservation price.
正确答案：downward; more people find that the price is less than their reservation price.