A Refrigerator Transfers Heat from a Colder Body to a Hotter

A refrigerator transfers heat from a colder body to a hotter body while energy is used to operate the device. This is

A) allowed only if the internal energy of the refrigerator increases.
B) consistent with Clausius's statement of the second law.
C) possible if entropy of the contents of the refrigerator increases.
D) impossible unless the refrigerator uses a Carnot cycle.