What do you do to permanently enable IPv6 protocol?

You issued the command “set ipv6-state on” in order to enable IPv6 protocol on a Security Gateway. The command was executed successfully. After reboot you notice that IPv6 protocol is not enabled.

What do you do to permanently enable IPv6 protocol?
A . Issue “set ipv6-state on” again; Save configuration and reboot
B . You need to modify Gateway Properties in SmartConsole and install policy in order to enable IPv6
C . You need to set “ipv6_state” parameter in $FWDIR/boot/modules/fwkern.conf and reboot
D . You need to install a valid license to use IPv6 protocol

Answer: A