In creating a fraud risk matrix, an internal auditor would most likely include fraud scenarios along with the relevant risks associated with each scenario. This approach allows for a detailed analysis of specific fraudulent acts that could occur and the risk levels pertaining to different areas of operation within the branch. This is essential for identifying and prioritizing fraud risks and helps in designing or enhancing controls to mitigate these risks effectively.References: IIA guidance on fraud risk management.

Developing policies and procedures for the internal audit activity is the most effective way for the chief audit executive (CAE) to ensure that internal auditors demonstrate due professional care. This action provides a framework and guidelines that direct auditors on how to perform their duties in accordance with the highest standards of audit practice, including adherence to ethical and professional standards set out by bodies such as the IIA.References: IIA Standard 1300 - Quality Assurance and Improvement Program

The best control to detect cash register disbursement fraud in a large retail store is using cash registers with internal tapes that are tamper-proof and require a manager to process voids or refunds. This control directly addresses the risk of cash misappropriation at the point of sale by adding a layer of oversight and security to the transactions, particularly those that are prone to manipulation like voids and refunds. References: Best practices in retail fraud prevention, which often include the use of technology and managerial oversight to control and monitor cash transactions.

Upon completion of an external quality assessment, the chief audit executive is required to report the detailed evaluation results of the external assessment to the board. This disclosure is crucial as it provides the board with insights into the effectiveness and efficiency of the internal audit function, highlighting areas of strength and opportunities for improvement. It facilitates informed decision-making regarding the internal audit activity's practices and processes.References: IIA Standard 1320 - Reporting on the Quality Assurance and Improvement Program

Risk avoidance is a strategy where an organization decides not to engage in actions or activities that carry risk.
By choosing to postpone new investments due to unfavorable economic conditions, management is opting to completely avoid the risks associated with these investments under the current economic scenario.References:
Institute of Internal Auditors (IIA) Glossary and Standards.