It Is a Warm Summer Day and You Are Having

It is a warm summer day and you are having lunch outdoors on a patio. A window air conditioning unit hums quietly nearby as it cools an office inside the building. Your friend notices that the unit's outdoor part is emitting a considerable amount of heat and comments on how strange that is. You explain correctly that the air conditioner's outside part is emitting the heat

A) it produces from the electricity it consumes.
B) that is left over when it converts thermal energy from the inside air into electricity.
C) it removes from the inside air and the heat it produces from the electricity it consumes.
D) it produces during its defrost cycle; when it warms up its evaporator to remove ice that forms because of the humidity.