Which of the following would be the BEST solution for a systems administrator to access the graphical user environment of a Linux machine remotely?

VNC provides a complete remote graphical desktop experience by capturing and streaming the framebuffer of the remote Linux machine to the local client, allowing full interaction with the GUI environment without requiring the user to be physically present.

KDE is a desktop environment that runs locally on the Linux machine - it is not a remote access protocol or tool.

X11 is a display server protocol that can forward individual application windows via X11 forwarding (SSH -X), but it is not designed as a standalone remote desktop solution and does not provide access to an existing graphical session.

RPC (Remote Procedure Call) is a mechanism for executing procedures across a network boundary in distributed applications and does not provide graphical desktop access.