C
Cal
Guest
Movement along the demand curve occurs when the price of the good changes (other factors held constant)
Movement from one demand curve to another occurs when other external factors change other than change in price.
So B, C, & D are held constant when there is a movement along a given demand curve for a good.
Movement from one demand curve to another occurs when other external factors change other than change in price.
So B, C, & D are held constant when there is a movement along a given demand curve for a good.