In internal auditing, when assessing the accuracy and completeness of employee time reporting, auditors often use sampling to determine the overall compliance of the process. In this scenario, the internal auditor sampled 30 employee time reports and found 5 incorrect and 4 unsupported reports. This indicates that a majority (21 out of 30) were accurate, suggesting that the organization generally ensures accurate reporting. However, the presence of incorrect and unsupported reports indicates deficiencies that need to be addressed, but do not point to systemic fraud or abuse. Thus, option D accurately reflects the findings by acknowledging both the general accuracy and the instances of errors.
Reference:
The Institute of Internal Auditors (IIA) - Standards for the Professional Practice of Internal Auditing COSO Framework - Control Activities and Monitoring