Batteries Must Be Used in Addition to Solar Cells When

Batteries must be used in addition to solar cells when generating household electricity because

A) solar cells can generate electricity only via the output of a battery.
B) solar cells can generate only a small fraction of the total energy needed by a household at any one time.
C) solar cells generate so much electricity that they will overheat if they cannot transfer the excess electricity somewhere to dissipate the extra heat.
D) batteries must supply the energy when sunlight is not available.