Which command can you rely upon to get you to a good known state where you can still boot the Oracle Solaris 11 Express…?

When upgrading to Oracle Solaris 11 from Oracle Solaris 11 Express or Oracle Solaris 11 Early
Adopter, the progress suddenly fails. Which command can you rely upon to get you to a good
known state where you can still boot the Oracle Solaris 11 Express or Oracle Snarls 11 Early
Adopter images, as they were, prior to your upgrade attempt?

A.
pkg

B.
beadm

C.
installadm

D.
zfs

E.
ifconfig

Explanation:
If an error occurs when booting the new BE, activate and boot to the previous BE.
Example:
# beadm activate solaris
# init 6