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. References: 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