To allow a regular user account to mount and unmount a filesystem (for instance, a cdrom or
floppy), which option will need to be added to the corresponding line in /etc/fstab?

A.
nouidchk

B.
alluser

C.
user

D.
auto

Explanation:
Answer C is correct. user options is used to allow an ordinary user to mount the file system. The
name of the mounting user is written to mtab so that user can unmount the file system again.