When selecting a risk response, the following should be considered:
B: Risk response costs
It's important to evaluate the costs associated with implementing a risk response to ensure that they are justified by the benefits of mitigating the risk. This helps in making cost-effective decisions that align with the organization's risk management objectives.

The most important component of effective security incident response is a documented communications plan.
A communications plan defines the roles and responsibilities, channels and methods, frequency and timing, and content and format of the communications that take place during and after a security incident. A communications plan helps to ensure that the relevant stakeholders are informed and updated about the incident status and outcome, and that the incident response activities are coordinated and consistent. A communications plan also helps to manage the expectations and perceptions of the stakeholders, and to maintain the trust and reputation of the enterprise. Network time protocol synchronization, identification of attack sources, and early detection of breaches are also important components of effective security incident response, but they are not as important as a documented communications plan. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.2.1.2, page 1931
1: ISACA Certified in Risk and Information Systems Control (CRISC) Exam Guide, Answer to Question
660.

A risk awareness program is a set of activities that aim to educate and inform employees about the organization's risk culture, policies, and procedures. A risk awareness program can help improve an organization's risk culture by enhancing the employees' understanding of risk, their roles and responsibilities in risk management, and the benefits of risk mitigation. A risk awareness program can also foster a culture of openness, trust, and collaboration among employees, managers, and stakeholders, which can improve the organization's risk performance and resilience.
Maintaining a documented risk register, rewarding employees for reporting security incidents, and allocating resources for risk remediation are also important aspects of risk management, but they do not directly address the organization's risk culture, which is the shared values, beliefs, and attitudes that influence how risk is perceived and handled within the organization.

An IT risk register is a document that records and tracks the IT risks that have been identified and assessed by the risk practitioner. It contains information such as the risk description, the risk owner, the risk level, the risk response, the risk status, and the risk monitoring and reporting activities. An IT risk register is a dynamic document that needs to be updated regularly to reflect the changes in the IT environment and the risk landscape. When a software upgrade renders an existing key control ineffective, the risk practitioner should update the IT risk register to indicate the new risk level, the new risk response, and the new risk monitoring and reporting activities. This will ensure that the IT risk register remains accurate, relevant, and useful for IT risk management. Updating the IT risk register is more important than updating the audit engagement letter, the risk profile, or the change control documentation, because the IT risk register is the primary source of information and guidance for managing IT risks. The audit engagement letter is a formal agreement between the auditor and the auditee that defines the scope, objectives, and terms of the audit. The risk profile is a summary of the organization's risk appetite, risk tolerance, and risk exposure. The change control documentation is a record of the changes that have been made to the IT systems and processes. These documents are important for IT risk management, but they are not as critical as the IT risk register for updating when a key control becomes ineffective. References = Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Assessment, Section 2.4: Risk Register, pp. 69-711

A three lines of defense structure is a model that defines the roles and responsibilities of different functions and levels within an organization for risk management and control. The first line of defense is the operational management, which is responsible for owning and managing the risks. The second line of defense is the risk management and compliance functions, which are responsible for overseeing and supporting the risk management processes. The third line of defense is the internal audit function, which is responsible for providing independent assurance on the effectiveness of the risk management and control systems. The greatest benefit of a three lines of defense structure is that it provides clear accountability for risk management processes, as it clarifies who is responsible for what, and how they interact and communicate with each other. This can help to avoid duplication, confusion, or gaps in the risk management activities, and ensure that the risks are properly identified, assessed, treated, monitored, and reported. References = CRISC Review Manual, 7th Edition, page 107.