What does an electricity meter measure?

An electricity meter measures the amount of energy transferred in kilowatt-hours (kWh), which is a standard unit used to quantify electrical energy consumption. This measurement indicates how much electrical energy has been used over a period of time, helping consumers and utility companies track and manage energy usage.

When considering other options, measuring voltage or resistance does not provide an understanding of energy consumption, as these are distinct electrical properties. Maximum power consumption refers to the highest level of power demand at any given point, but it does not reflect the total energy used over time. Therefore, kWh is the correct measure that encapsulates total energy consumption, making option C the accurate choice.