Answer:
The correct answer is letter "D": the services of an independent auditor.
Step-by-step explanation:
Every time an internal auditor feels there is inaccurate information on the company's books, requesting for an external audit of a Certified Public Accountant (CPA) is a valid option. Auditors must clarify any piece of information that seems ambiguous in a firm's general ledger. Otherwise, if mistakes or fraud are found, the auditor can be considered an accomplice of such activities.