Defining risk response options is performed after a risk assessment is completed. A risk assessment is the process of identifying, analyzing, and evaluating the risks that affect the enterprise's objectives and operations. After a risk assessment is completed, the enterprise needs to define the risk response options, which are the actions that can be taken to address the risks. The risk response options include accepting, avoiding, transferring, mitigating, or exploiting the risks. Defining risk response options helps to select the most appropriate and effective strategy to manage the risks. Defining risk taxonomy, identifying vulnerabilities, and conducting an impact analysis are performed before or during a risk assessment, not after.
References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.1.4, page 541
1: ISACA Certified in Risk and Information Systems Control (CRISC) Exam Guide, Answer to Question
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* A project sponsor is the person or group who provides the financial, political, or organizational support for a project, and who has the authority to approve or reject the project's objectives, scope, budget, schedule, and deliverables.
* The primary recipient of reports showing the progress of a current IT risk mitigation project should be the project sponsor, because they are ultimately responsible for the success or failure of the project, and they need to be informed of the project's status, issues, risks, and achievements on a regular basis.
* The other options are not the primary recipients of reports showing the progress of a current IT risk mitigation project. They are either secondary or not essential for project reporting.
The references for this answer are:
* Risk IT Framework, page 21
* Information Technology & Security, page 15
* Risk Scenarios Starter Pack, page 13

Robotic process automation (RPA) is the use of software robots or artificial intelligence (AI) agents to automate repetitive, rule-based tasks that are normally performed by humans. RPA can improve efficiency, accuracy, and scalability of business processes, but it can also introduce new risks or change the existing risk profile. Therefore, the risk practitioner's best course of action is to reassess whether the mitigating controls that were designed for the human-performed processes are still effective and adequate for the RPA-enabled processes. This may involve reviewing the control objectives, testing the control performance, identifying the control gaps, and recommending the control enhancements or modifications. References = CRISC Review Manual, 7th Edition, page 177.

The most significant risk to an organization when updating the incident response plan is the undefined assignment of responsibility. An incident response plan is a document that defines the roles, responsibilities, procedures, and resources for responding to an incident that could disrupt the normal operations of the organization, or compromise its assets, reputation, or compliance. An incident response plan should clearly assign the responsibility for each task and activity involved in the incident response process, such as detection, containment, analysis, eradication, recovery, and reporting. Undefined assignment of responsibility could lead to confusion, duplication, conflict, or omission among the stakeholders, and impair the effectiveness and efficiency of the incident response process. Undefined assignment of responsibility could also increase the risk of escalation, recurrence, or impact of the incident, and affect the accountability and performance of the organization. Obsolete response documentation, increased stakeholder turnover, and failure to audit third-party providers are also risks, but they are not as significant as undefined assignment of responsibility, as they do not directly affect the execution and outcome of the incident response process. References = CRISC Review Manual, 6th Edition, ISACA, 2015, page 130.

* The risk of terminated employee accounts maintaining access is that the former employees or unauthorized parties may use the accounts to access or manipulate the organization's information systems or resources, and cause harm or damage to the organization and its stakeholders, such as data loss, data breach, system failure, fraud, etc.
* The first step to address the risk of terminated employee accounts maintaining access is to disable user access, which means to revoke or remove the permissions or privileges that allow the accounts to access or use the organization's information systems or resources. Disabling user access can help the organization to address the risk by providing the following benefits:
* It can prevent or stop the former employees or unauthorized parties from accessing or using the organization's information systems or resources, and reduce or eliminate the potential harm or damage that they may cause for the organization and its stakeholders.
* It can ensure the confidentiality, integrity, availability, and reliability of the organization's information systems or resources, and protect them from unauthorized access or manipulation.
* It can provide useful evidence and records for the verification and validation of the organization's access control function, and for the compliance with the organization's access control policies and standards.
* The other options are not the first steps to address the risk of terminated employee accounts maintaining access, because they do not provide the same level of urgency and effectiveness that disabling user access provides, and they may not be sufficient or appropriate to address the risk.
* Performing a risk assessment is a process of measuring and comparing the likelihood and impact of various risk scenarios, and prioritizing them based on their significance and urgency.
Performing a risk assessment can help the organization to understand and document the risk of terminated employee accounts maintaining access, but it is not the first step to address the risk, because it does not prevent or stop the former employees or unauthorized parties from accessing or using the organization's information systems or resources, and it may not be timely or feasible to perform a risk assessment before disabling user access.
* Developing an access control policy is a process of defining and describing the rules or guidelines that specify the expectations and requirements for the organization's access control function, such as who can access what, when, how, and why. Developing an access control policy can help the organization to establish and communicate the boundaries and objectives for the organization's access control function, but it is not the first step to address the risk, because it does not prevent or stop the former employees or unauthorized parties from accessing or using the organization's information systems or resources, and it may not be relevant or applicable to the existing or emerging risk scenarios that may affect the organization's access control function.
* Performing a root cause analysis is a process of identifying and understanding the underlying or fundamental causes or factors that contribute to or result in a problem or incident that has occurred or may occur in the organization. Performing a root cause analysis can help the organization to address and correct the risk of terminated employee accounts maintaining access, and prevent or reduce its recurrence or impact, but it is not the first step to address the risk, because it does not prevent or stop the former employees or unauthorized parties from accessing or using the organization's information systems or resources, and it may not be timely or feasible to perform a root cause analysis before disabling user access. References =
* ISACA, CRISC Review Manual, 7th Edition, 2022, pp. 40-41, 47-48, 54-55, 58-59, 62-63
* ISACA, CRISC Review Questions, Answers & Explanations Database, 2022, QID 207
* CRISC Practice Quiz and Exam Prep