The movement from point A to point B on the following graph is caused by ______.
A、an increase in price
B、a decrease in price
C、a decrease in the price of a substitute good
D、an increase in income
The movement from point A to point B on the following graph - 5. Demand and Supply - 微观经济学(全英) - 重庆高校在线开放课程平台 | 大学网课搜题引擎