Which statement is true about zone-based firewalls?

Which statement is true about zone-based firewalls?

A.
An interface can be assigned to multiple zones.

B.
Traffic between a zone member interface and any interface that is not a zone member can be
allowed via an access list.

C.
Traffic is implicitly allowed to flow by default among interfaces that are members of a different
zone.

D.
In the self zone, all traffic to any router interface is allowed until traffic is explicitly denied.