Dollars per u l00 I'S 215 2'5 300 Quantity of energy-emcienl light bulbs (thousands) FIGURE 3-2 Refer to Figure 3-2. A shift of the supply curve from Sto 52 could be caused by O a change in consumers' preferences away from ordinary light bulbs toward energy-efficient light bulbs. O a decrease in the price of energy-efficient light bulbs. 0 an event that causes firms to move away from production of energy-efficient light bulbs. 0 an increase in the price of energy-efficient light bulbs. O a decrease in the price of glass, 3 major input in the production of energy- efficient light bulbs