The coefficient of performance (α) of a refrigerator is equal to? (Q1 is the heat released to the hot reservoir, Q2 is the heat extracted from the cold reservoir and W is the work done on the system–the refrigerant.)

The coefficient of performance (α) of a refrigerator is equal to? (Q1

1.	The coefficient of performance (α) of a refrigerator is equal to? (Q1 is the heat released to the hot reservoir, Q2 is the heat extracted from the cold reservoir and W is the work done on the system–the refrigerant.)
A.	Q1/W
B.	(Q2-Q1)/W
C.	(Q1-Q2)/W
D.	Q2/W
Answer» E.