Answer:
The correct answer is the option D: the equilibrium price of MP3 players will increase; the equilibrium quantity will decrease.
Step-by-step explanation:
First of all, the supply and demand curves are the graphical representation of the price and the quantity demanded and supplied respectively in each case. Moreover, in the graphic when both curves are in equilibrim that means that there is a single point in where the price and the quantity are established together for the market. Furthermore, when there is a shift of any curve that point will be changed so when there is a shift in the demand curve to the right the price will increase and the quantity will increase but if there is a shift in the supply change to the left and that shift is greater then the price will increase but the quantity will decrease.