Answer:
d. Change management
Step-by-step explanation:
Change management can be defined as a strategic process which typically involves implementing changes (modifications) to an existing process or elements on a computer system.
In this scenario, an administrator edits the network firewall configuration. After editing the configuration, the administrator logs the date and time of the edit and why it was performed in the firewall documentation. Thus, what best describes these actions is change management.
As a network administrator, you would be required to perform changes to your network and network devices in order to get an optimum level of performance.