Final answer:
When making your household electric payment at the end of the month, you are billed for energy.
Step-by-step explanation:
When making your household electric payment at the end of the month, you are billed for energy. Electricity bills state the energy used in units of kilowatt-hours (kWh), which is the product of power in kilowatts and time in hours. Therefore, the correct option is D) Current and energy.