During a vendor management database audit, an IS auditor identifies multiple instances of duplicate vendor records. In order to prevent recurrence of the same issue, which of the following would be the IS auditor’s BEST recommendation to management?

A. Perform system verification checks for unique data values on key fields.
B. Request senior management approval of all new vendor details.
C. Run system reports of full vendor listings periodically to identify duplication.
D. Build a segregation of duties control into the vendor creation process.