A single point of contact within the organization is the most important element to include when incorporating media communication procedures into the security incident communication plan because it helps to ensure a consistent and accurate message to the public and avoid confusion or misinformation. A single point of contact is a designated person who is authorized and trained to communicate with the media on behalf of the organization during a security incident. The single point of contact should coordinate with the incident response team, senior management, legal counsel, and public relations to prepare and deliver timely and appropriate statements to the media, as well as to respond to any inquiries or requests. A single point of contact also helps to prevent unauthorized or conflicting disclosures from other employees or stakeholders that may harm the organization's reputation or legal position. Therefore, a single point of contact within the organization is the correct answer.
References:
https://www.lifars.com/2020/09/communication-during-incident-response/
https://ifpo.org/resource-links/articles-and-reports/public-and-media-relations/planning-for-effective-media- relations-during-a-critical-incident/
https://www.techtarget.com/searchsecurity/tip/Incident-response-How-to-implement-a-communication-plan.

= Initiating the organization's incident response process is the best course of action for the information security manager when a cloud application used by the organization is found to have a serious vulnerability.
The incident response process is a set of predefined steps and procedures that aim to contain, analyze, resolve, and learn from security incidents. The information security manager should follow the incident response process to ensure that the vulnerability is properly reported, assessed, mitigated, and communicated to the relevant stakeholders. The incident response process should also involve the cloud service provider (CSP) and the business owner of the application, as they are responsible for the security and functionality of the cloud application. Instructing the vendor to conduct penetration testing, suspending the connection to the application in the firewall, and reporting the situation to the business owner of the application are all possible actions that may be taken as part of the incident response process, but they are not the best initial course of action.
Penetration testing may help to identify the root cause and the impact of the vulnerability, but it may also cause further damage or disruption to the cloud application. Suspending the connection to the application in the firewall may prevent unauthorized access or exploitation of the vulnerability, but it may also affect the availability and continuity of the cloud application. Reporting the situation to the business owner of the application is an important step to inform them of the risk and the potential business impact, but it is not sufficient to address the vulnerability and its consequences. Therefore, the information security manager should initiate the incident response process as the best course of action, and then perform the other actions as appropriate based on the incident response plan and the risk assessment. References = CISM Review Manual
2023, page 211 1; CISM Practice Quiz 2

The best thing to include in a business case when the return on investment (ROI) for an information security initiative is difficult to calculate is an estimated reduction in risk. Risk reduction is the expected benefit of implementing an information security initiative, as it reduces the likelihood and impact of threats and vulnerabilities that may affect the organization's information assets and systems. By estimating the reduction in risk, the information security manager can demonstrate the value and benefits of the information security initiative to the organization's performance, reputation, and competitiveness. The information security manager can also compare the estimated reduction in risk with the estimated cost of the information security initiative to determine its cost-effectiveness and feasibility. The other options are not the best thing to include in a business case, although they may be some inputs or outputs of the risk assessment process. A projected increase in maturity level is a potential outcome of implementing an information security initiative, as it improves the organization's capabilities and processes for managing information security risks. However, it does not necessarily reflect the actual reduction in risk or the ROI of the information security initiative. A projected cost over time is a component of calculating the ROI of an information security initiative, as it reflects the total cost of ownership and maintenance of the initiative. However, it does not indicate the expected benefit or value of the initiative. An estimated increase in efficiency is a possible benefit of implementing an information security initiative, as it may enhance the organization's productivity and performance. However, it may not be directly related to the reduction in risk or the ROI of the information security initiative.

The primary reason to regularly update business continuity and disaster recovery documents is to ensure that the plans and procedures are aligned with the current business needs and objectives, and that they can effectively support the availability of business operations in the event of a disaster. Updating the documents also helps to enforce security policy requirements, maintain business asset inventories, and ensure audit and compliance requirements are met, but these are secondary benefits.
References = CISM Review Manual, 16th Edition eBook1, Chapter 9: Business Continuity and Disaster Recovery, Section: Business Continuity Planning, Subsection: Business Continuity Plan Maintenance, Page
378.

Eradication is the phase of incident response where the incident team removes the threat from the affected systems and restores them to a secure state. If this phase is not successful, the malware may persist or reappear on the systems, causing further damage or compromise. Therefore, eradication is the correct answer.
References:
https://www.securitymetrics.com/blog/6-phases-incident-response-plan
https://www.atlassian.com/incident-management/incident-response
https://eccouncil.org/cybersecurity-exchange/incident-handling/what-is-incident-response-life-cycle/