The Fact That Solar Systems Only Generate Electricity During the Day

The fact that solar systems only generate electricity during the day is typically not a problem because:

A) many photovoltaic cells continue to generate electricity through the night.
B) they currently do not produce much electricity on a global scale.
C) demand for electricity is often highest during the day.
D) the electricity can be used to power Stirling engines.
E) they are often located in deserts.