Which three options are true of the Oracle Solaris 11 root file system?

Which three options are true of the Oracle Solaris 11 root file system?

A.
ZFS isthe default with UFSas an option.

B.
ZFSon rpool/ROOTis mandatory.

C.
Mirroring isenabled by default.

D.
Alternate bootenvironments contain only the differences from the previous boot environment.

E.
Specificboot environments can be specified from GRUB (x86) as well as OBP (SPARC).

Explanation:
A:ZFS is the default root file system.
UFS is a supported legacy file system, but it is not supported as a bootable root file system.
E:
If your system has more than one OS installed on the system or more than one root boot
environment in a ZFS root pool, you can boot from these boot environments for both SPARC and
x86 platforms:

*Starting with the Solaris 10 10/08 release for a SPARC based system, you can boot a ZFS root
file system in a ZFS pool. For ZFS root pools, you can list the available boot environments withthe
boot command with the -L option. You can then choose a boot environment and use the OBP boot
command with the -Z option to boot that boot environment.
*Starting with the Solaris 10 1/06 release for x86 based systems, a GRUB boot menu provides the
interface for booting between different boot environments.
Note:
*The name originally stood for “Zettabyte File System”but today does not stand for anything.
Incorrect:
Not C: Mirroring is not enabled by default.
Not D:Alternate bootenvironments
If you want to create a backup of an existing boot environment, for example, prior to modifying the
original boot environment, you can use the beadm command to create and mount a new boot
environment that is a clone of your active boot environment. This clone is listed as an alternate
boot environment in the GRUB menu for x86 systems or in the boot menu for SPARC systems.