Which of the following considerations is important for managing server roles in Windows Server 2019?

The correct choice highlights a key feature of Windows Server 2019, which is the capability of Server Manager to manage remote servers. This is significant for network administrators as it allows for centralized management of multiple servers from a single interface. By using Server Manager, administrators can monitor and configure roles and features across different servers, streamlining their workflow and reducing the time spent switching between machines.

Utilizing remote management also enhances efficiency, especially in large environments where physical access to servers may not be practical. Administrators can perform tasks, apply updates, and manage configurations without having to be on site.

The other considerations presented do not accurately depict the capabilities and flexibility of server management in Windows Server 2019. The need for server roles to be modified strictly via the GUI is not true as PowerShell provides a powerful command-line alternative for such tasks. The statement regarding remote access from Windows client machines is misleading; management tools can indeed be accessed remotely. Lastly, not all server roles necessitate local installation, as roles can often be managed or installed remotely. This reinforces why the ability to manage remote servers through Server Manager is vital in modern server administration.