A disadvantage of solar energy is the need for _____.

time-consuming daily maintenance of equipment
a special fee for the energy collected by the unit
a supplemental cooling unit to prevent the water from getting too hot
a supplemental heating unit for cloudy days, winters, and nighttimes

Question

A disadvantage of solar energy is the need for _____.
 	
	time-consuming daily maintenance of equipment
	a special fee for the energy collected by the unit
	a supplemental cooling unit to prevent the water from getting too hot
	a supplemental heating unit for cloudy days, winters, and nighttimes

anonymous · Answer

People are debating whether it's C or D

anonymous · Answer

Go wit C! ;D