A, and C are incorrect. These all choices itself comes under risk action plan. As in the described scenario, risk action plan is not turned to be effective, these should not be implemented again.

Section: Volume D

The most likely cause for a risk practitioner to reassess risk scenarios is a change in the regulatory environment. A regulatory environment is the set of laws, rules, and standards that apply to an organization and its activities, such as data privacy, security, compliance, or governance. A change in the regulatory environment can occur due to various factors, such as new legislation, court rulings, enforcement actions, or industry trends. A change in the regulatory environment can affect the risk scenarios that the organization faces, as it may introduce new or modified risks, or alter the probability or impact of existing risks. For example, a new regulation may require the organization to implement additional or different controls, or to report or disclose more information, which may increase the cost, complexity, or vulnerability of the organization's processes and systems. A change in the regulatory environment may also affect the risk appetite, tolerance, and capacity of the organization, as it may impose different requirements or expectations for the organization's risk management performance and outcomes. Therefore, a risk practitioner should reassess the risk scenarios when there is a change in the regulatory environment, to ensure that the risk scenarios are accurate, complete, and relevant, and that the risk response strategies and plans are appropriate, effective, and compliant. The other options are not the most likely cause, although they may be related or influential to the risk scenarios. A change in the risk management policy is a change in the rules and guidelines that define how the organization manages its risks, such as the roles and responsibilities, the processes and procedures, the tools and techniques, or the reporting and communication. A change in the risk management policy can affect the risk scenarios, as it may change the way the organization identifies, analyzes, evaluates, and responds to the risks, but it does not directly create or modify the risks themselves. A major security incident is an event or situation that compromises the confidentiality, integrity, or availability of the organization's information or systems, such as a data breach, a denial-of-service attack, or a ransomware infection. A major security incident can affect the risk scenarios, as it may indicate or reveal the existence or severity of the risks, or trigger or escalate the consequences of the risks, but it is not a cause, rather it is an effect of the risks. An increase in intrusion attempts is an increase in the frequency or intensity of the unauthorized or malicious attempts to access or exploit the organization's information or systems, such as phishing, malware, or brute-force attacks. An increase in intrusion attempts can affect the risk scenarios, as it may increase the likelihood or impact of the risks, or expose or exacerbate the vulnerabilities of the organization's processes and systems, but it is not a cause, rather it is a manifestation of the risks. References
= Risk Scenarios Toolkit - ISACA, How to Write Strong Risk Scenarios and Statements - ISACA, The Impact of Regulatory Change on Business - Deloitte

Section: Volume A
Explanation:
Components of risk scenario that are needed for its analysis are:
* Actor: Actors are those components of risk scenario that has the potential to generate the threat that can be internal or external, human or non-human. Internal actors are within the enterprise like staff, contractors, etc. On the other hand, external actors include outsiders, competitors, regulators and the market.
* Threat type: Threat type defines the nature of threat, that is, whether the threat is malicious, accidental, natural or intentional.
* Event: Event is an essential part of a scenario; a scenario always has to contain an event. Event describes the happenings like whether it is a disclosure of confidential information, or interruption of a system or project, or modification, theft, destruction, etc.
* Asset: Assets are the economic resources owned by business or company. Anything tangible or intangible that one possesses, usually considered as applicable to the payment of one's debts, is considered an asset. An asset can also be defined as a resource, process, product, computing infrastructure, and so forth that an organization has determined must be protected. Tangible asset: Tangible are those asset that has physical attributes and can be detected with the senses, e.g., people, infrastructure, and finances.
Intangible asset: Intangible are those assets that has no physical attributes and cannot be detected with the senses, e.g., information, reputation and customer trust.
* Timing dimension: The timing dimension is the application of the scenario to detect time to respond to or recover from an event. It identifies if the event occurs at a critical moment and its duration. It also specifies the time lag between the event and the consequence, that is, if there an immediate consequence (e.g., network failure, immediate downtime) or a delayed consequence (e.g., wrong IT architecture with accumulated high costs over a long period of time).