Much of the Increasing Global Need for Electricity Can Be

Much of the increasing global need for electricity can be met by solar sources because

A) about 70% of electrical demand occurs when the sun is shining.
B) modern battery technology now makes electrical storage cheap and efficient.
C) only about one square meter of photovoltaic cells are needed to heat a home.
D) even at night most solar power systems run at about 50% of normal capacity.