The correct answer is Files written to the temporary D drive.

The temporary D drive is ephemeral and is intended for temporary files and the page file. Redeploying the virtual machine can move it to a different host and that drive is not preserved so any files stored there are removed.

New desktop wallpaper is stored in the user profile or registry on the operating system disk and the OS disk is persistent so the wallpaper remains after a redeploy.

Files created on the operating system drive C are written to the persistent OS disk which is not cleared by a redeploy so those files are retained.

Changed screen saver timeout setting is a user or system setting that is stored on the OS disk and in the registry so a redeploy does not remove that configuration.

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