Which configuration should you add at the [edit protocols] level to allow you to accomplish this objective?

You must route both IPv4 and IPv6 packets in your environment. Which configuration should you
add at the [edit protocols] level to allow you to accomplish this objective?

A.
ospf {
area 0.0.0.0 {
interface all;
}}

B.
ospf {
area 0.0.0.0 {
interface all;
family inet6;

}}

C.
ospf3 {
area 0.0.0.0 {
interface all;
}}

D.
ospf3 {
area 0.0.0.0 {
interface all;
allow ipv4;
}}