Explanation
Awareness training would most likely result in any attempted tailgating being challenged by the authorized employee. Choices A, B and D are physical controls that, by themselves, would not be effective against tailgating.

Explanation
Threat and vulnerability assessments are important PRIMARILY because they are the basis for setting control objectives. Control objectives are the desired outcomes or goals of implementing security controls in an information system. They are derived from the risk assessment process, which identifies and evaluates the threats and vulnerabilities that could affect the system's confidentiality, integrity and availability. By conducting threat and vulnerability assessments, an organization can determine the level of risk it faces and establish the appropriate control objectives to mitigate those risks.

Section: INFORMATION SECURITY PROGRAM DEVELOPMENT

The best action for the system admin manager to address the issue of negligent handling of incident alerts by system admins is to provide incident response training to data custodians because it helps to improve their awareness and skills in recognizing and reporting security incidents, and following the incident response procedures and protocols. Conducting a risk assessment and sharing the result with senior management is not a good action because it does not address the root cause of the issue or provide any solutions or improvements. Revising the incident response plan to align with business processes is not a good action because it does not address the root cause of the issue or provide any solutions or improvements. Providing incident response training to data owners is not a good action because data owners are not responsible for handling incident alerts or performing incident response tasks. Reference: https://www.isaca.org/resources/isaca-journal/issues/2017/volume-5/incident-response-lessons-learned https://www.isaca.org/resources/isaca-journal/issues/2018/volume-3/incident-response-lessons-learned