Q4 Single choice Mark for later What does the command mount -a do? A It mounts all available filesystems onto the current directory. B It shows all mounted filesystems. C It mounts all user mountable filesystems for the current user. D It mounts all filesystems listed in /etc/fstab which have the option auto set. E It mounts all filesystems listed in /etc/fstab which have the option noauto set. Correct answer