The Consider the following events: a. The price of cell phones goes down by 25 percent during a sale. This event would cause a (Click to select) A b. You get a 25 percent raise at your job. This event would cause a (Click to select) a Which of the following statements is true? a. A change in something other than price will mean a movement along an existing demand curve. b. A change in price will cause a shift of the demand curve. c. A change in price will mean a movement along an existing demand curve. d. A change in income will cause a movement along the demand curve.