The argument above requires which of the following assumptions? A. Home-appliance usage would not increase along with the energy efficiency of the appliances. B. It would not be expensive to produce home appliances that are energy-efficient. C. Home-appliance manufactures now have the technology to produce appliances that are twice as energy-efficient as those currently available. D. The cost of energy to the consumer would rise with increases in the energy efficiency of home appliances. E. The percentage of energy consumed by home appliances will increase if existing appliances are not replaced by more energy-efficient models.