A senior executive asked an administrator to change the default background of the executive machine, which uses XDM. Which of the following filesA senior executive asked an administrator to change…

The `/etc/X11/xdm/Xsetup` script is executed by XDM before the login dialog appears, allowing an administrator to run commands like `xsetroot` or `xloadimage` to set the background of the X display for the login screen. This script provides a way to configure the visual environment prior to user authentication.

`/etc/X11/xdm.conf` is not a standard configuration file for setting the XDM background; XDM configuration is typically found in files within the `/etc/X11/xdm/` directory.

`/etc/X11/xdm/Defaults` typically contains default X resources for XDM and might control some aesthetic aspects, but it is not the script used for executing commands to set the background image directly.

`/etc/X11/defaults.conf` is not a standard configuration file for setting the XDM background; XDM configuration is typically found in files within the `/etc/X11/xdm/` directory.