Which statement is true concerning 6to4 tunneling?

Which statement is true concerning 6to4 tunneling?

A.
IPv4 traffic is encapsulated with an IPv6 header.

B.
The edge routers can use any locally configured IPv6 address.

C.
Hosts and routers inside a 6to4 site will need a special code.

D.
An edge router must use IPv6 address of 2002::/16 in its prefix.

Explanation:
6to4 tunnels use IPv6 addresses that concatenate 2002::/16 with the 32-bit IPv4 address of
the edge router, creating a 48-bit prefix.