An electrical device consumes 1000 joules of energy in a second. If it runs for one hour, what will be the amount of electricity consumed by it?

A. It will consume 1 unit of electricity, i.e 10 kWh of electricity

B. It will consume 1 unit of electricity, i.e 100 kWh of electricity

C. It will consume 1 unit of electricity, i.e 1 Wh of electricity

D. It will consume 1 unit of electricity, i.e 1 kWh of electricity

Answer: Option D