Answer:
D.the services of an independent auditor.
Step-by-step explanation:
In accounting based on the consistency principle, the method of reporting financial records should be consistent from one accounting period to the other. This enables easy comparison between previous and present records.
So in order to determine there need for an auditor to provide an opinion on the accuracy of the companie's financial statements.
The change in method of reporting could have been done to hide a discrepancy.