The phrase 'increase in quantity demanded' signifies: Hint: look up the terminology associated with movements along and shifts of the demand curve! a. a movement along the demand curve from left to right (i . e . moving down the demand curve) . b. a shift of the demand curve to the left. c. a movement along the demand curve from right to left (i . e . moving up the demand curve) . d. a shift of the demand curve to the right