A user runs the fsck command with the $-$f option on an ext$4$ filesystem that is showing signs of corruption. How would that user locate any files the system was unable to repair? a$.$ Look in the root of the filesystem. b$.$ The system prompts the user for a target location when it comes across a file it cannot repair. c$.$ Mount the filesystem and check the lost$+$found directory underneath the mount point. d$.$ View the contents of the directory $/$lost$+$found.