The correct answer is: A. mount -t iso9660 /dev/cdrom / mnt/cdrom
Option B is incorrect because it does not specify the file system type. Option C is incorrect because it does not specify the device node. Option D is incorrect because it includes both incorrect and correct options. Option E is incorrect because there is at least one correct option.
To mount a CD-ROM drive, you need to use the mount command. The syntax for the mount command is:
mount [options] device mountpoint
The device is the device node of the CD-ROM drive. The mountpoint is the directory where you want to mount the CD-ROM drive.
The iso9660 file system type is the standard file system type for CD-ROMs.
The /dev/cdrom device node is the device node for the first CD-ROM drive.
The /mnt/cdrom mountpoint is a common mountpoint for CD-ROM drives.
Therefore, the correct command to mount a CD-ROM drive is:
mount -t iso9660 /dev/cdrom / mnt/cdrom