Final answer:
The government determined that increasing the energy efficiency of washing machines was the best way to reduce energy consumption through cost-benefit analysis and regulation.
Step-by-step explanation:
The government determined that increasing the energy efficiency of washing machines was the best way to reduce energy consumption through cost-benefit analysis and regulation. Cost-benefit analysis involves comparing the costs of implementing energy-efficient measures with the benefits of reduced energy consumption. By regulating manufacturers to produce more energy-efficient washing machines, the government can ensure that consumers have access to products that help reduce energy consumption.