4. During the audit of Carnegie Enterprises, LLC, it has been determined by the external auditor that several employees have been paid for overtime hours that were not actually worked. As a result of this finding, which of the following would represent an appropriate recommendation of an internal control that senior management should enact? A) All employees should be made to sign a weekly attestation that all of the hours they worked are complete and correct. B) Existing supervisory staff should be either terminated or reassigned to other areas of the business, and new supervisory staff hired. C) In the future, supervisory staff should regularly review and document hours worked by their subordinates. D) None of these answer choices are correct