You have just added a CD-ROM drive (/dev/hdd) to your system and have added it to your fstab.
Typically you can use which of the following commands to mount media in that drive to
/mnt/cdrom?

A.
mount/dev/cdrom/mnt/cdrom

B.
mount/dev/cdrom

C.
mount -t cdrom/dev/cdrom/mnt/cdrom

D.
mount/mnt/cdrom

E.
automount/mnt/hdd/mnt/cdrom