Air washers used in air conditioning systems achieve heating and humidification by
a) cooling the spray water to a temperature below the dew point of the entering air
b) cooling the spray water to a temperature below the dry bulb temperature
c) heating the spray water to a temperature above the dry bulb temperature of the entering air
d) heating the entering air above its dry bulb temperature
e) cooling the entering air below its dry bulb temperature
Answer: C