The number of reported incidents has increased is the best evidence that a recently established information security program is effective because it indicates that the organization has improved its detection and reporting capabilities and has raised awareness among employees about security issues. Regular IT balanced scorecards are communicated is not a good evidence because it does not measure the actual performance or outcomes of the security program. Senior management has reported fewer junk emails is not a good evidence because it does not reflect the overall security posture or maturity of the organization. The number of tickets associated with IT incidents have stayed consistent is not a good evidence because it does not show any improvement or reduction in security incidents or risks. Reference: https://www.isaca.org/resources/isaca-journal/issues/2016/volume-6/how-to-measure-the-effectiveness-of-information-security-using-iso-27004 https://www.isaca.org/resources/isaca-journal/issues/2014/volume-6/how-to-measure-the-effectiveness-of-your-information-security-management-system

The best course of action for the information security manager to support the initiative of leveraging popular social network platforms to promote the organization's products and services is to assess the security risk associated with the use of social networks. Security risk assessment is a process of identifying, analyzing, and evaluating the potential threats and vulnerabilities that may affect the confidentiality, integrity, and availability of information assets and systems. By conducting a security risk assessment, the information security manager can provide valuable input to the decision-making process regarding the benefits and costs of using social networks, as well as the appropriate security controls and mitigation strategies to reduce the risk to an acceptable level. The other options are not the best course of action, although they may be part of the security risk management process. Establishing processes to publish content on social networks is an operational task that should be performed after assessing the security risk and implementing the necessary controls. Conducting vulnerability assessments on social network platforms is a technical activity that may not be feasible or effective, as the organization does not have control over the platforms' infrastructure and configuration. Developing security controls for the use of social networks is a preventive measure that should be based on the results of the security risk assessment and aligned with the organization's risk appetite and tolerance

When recovering a compromised system that needs a complete rebuild, the first step should be to restore configuration management files. Configuration management files are critical for identifying the system's original state and the changes that were made to it, and restoring them can help ensure that the system is rebuilt to its original state.
According to the Certified Information Security Manager (CISM) Study Manual, "The initial phase of the recovery process requires that configuration management files be restored. These files represent the foundation of the system and provide insight into the original state of the system, which is important for identifying changes that were made to the system as well as ensuring the recovery process can return the system to its original state." Patch management files, network system logs, and intrusion detection system (IDS) logs are also important in the recovery process, but they should be addressed after configuration management files have been restored.
Reference:
Certified Information Security Manager (CISM) Study Manual, 15th Edition, Page 256.

The business owner is the most appropriate person to own the risk associated with the failure of a privileged access control because they are ultimately responsible for the protection and use of the information in their business unit1. The data owner is responsible for determining the access rights for specific data sets, but not for the access control mechanisms2. The information security manager is responsible for implementing and enforcing the security policies and standards, but not for owning the risk3. The compliance manager is responsible for ensuring that the organization meets the regulatory requirements, but not for owning the risk3. Reference: 1 https://www.cyberark.com/resources/blog/how-do-you-prioritize-risk-for-privileged-access-management 3 https://www.isaca.org/resources/isaca-journal/issues/2017/volume-1/capability-framework-for-privileged-access-management 2 https://security.stackexchange.com/questions/218049/what-is-the-difference-between-data-owner-data-custodian-and-system-owner