According to IIA guidance, which of the following statements is true regarding due professional care?

According to IIA guidance, due professional care means that internal auditors must apply the care and skill expected of a reasonably prudent and competent internal auditor. This involves considering the cost of assurance in relation to potential benefits and exercising judgment and care in accordance with the complexity of the task. It does not imply an exhaustive review of all transactions or guarantees that all significant risks will be identified or that fraud does not exist.

The Institute of Internal Auditors (IIA) - International Standards for the Professional Practice of Internal Auditing, specifically those related to due professional care.