Which of the following best demonstrates that the internal audit activity is using due professional...

Demonstrating due professional care involves using appropriate technology and data analysis techniques to enhance the audit's effectiveness and efficiency. These tools help auditors identify anomalies, trends, and potential areas of risk more accurately and timely, reflecting a higher standard of care in their audit activities.

References:

"Auditing Standards and Guidelines," which emphasize the importance of using advanced techniques in audit processes.