Two Refrigerators,one with a COP of 4

Multiple Choice

Two refrigerators,one with a COP of 4.0 and another with a COP of 5.0,both extract 400 kJ of heat from the cold reservoir (food) .Calculate the difference in energy they exhaust to the hot reservoir and hence the room.

A) 320 kJ
B) 80 kJ
C) 125 kJ
D) 100 kJ
E) 20 kJ