In a Standard Audit Program for Goodwill Impairment Testing,if the Original

In a standard audit program for goodwill impairment testing,if the original reporting unit no longer exists because operations have been fully integrated into operations of the parent company the auditor should do which of the following?

A) compare market value with carrying value.A market value less than carrying value is presumptive evidence that goodwill has been impaired.
B) compare fair value with realizable value.A fair value less than realizable value is presumptive evidence that goodwill has been impaired.
C) compare book value with realizable value.A book value less than realizable value is presumptive evidence that goodwill has been impaired.
D) compare book value with market value.A market value less than book value is presumptive evidence that goodwill has been impaired.