Refer to Figure 3minus2. A shift of the supply curve from S to S1 could be caused by a decrease in the price of glass, a major input in the production of energyminusefficient light bulbs. B. a change in consumers' preferences away from ordinary light bulbs toward energyminusefficient light bulbs. C. an expectation that new government regulations will ban the use of energyminusefficient light bulbs. D. a decrease in the price of energyminusefficient light bulbs. E. an increase in the price of energyminusefficient light bulbs.