A user mounts a device to a mount point directory and realizes afterward they need files previously found within the mount point directory. What should this user do$?$ a$.$ Nothing; the files are lost and cannot ever be accessed. b$.$ Nothing; the files could not have been there because you can only mount to empty directories. c$.$ Unmount the device from the directory. d$.$ Run the fsck command to recover the files. e$.$ Look in the lost$+$found directory for the files.