Which three statements about IPv6 Rapid Deployment 6rd are true? (Choose three.)

A.
ISP must introduce the changes into the core network.

B.
IPv6 Rapid Deployment 6rd is a modified 6-to-4 protocol.

C.
IPv6 Rapid Deployment 6rd uses a user-defined prefix.

D.
IPv6 Rapid Deployment 6rd encapsulates IPv6 in ISP network in IPv4 between ISP 6rd gateway and
CP

E.
6rd addresses can include 32 bits taken from the customer IPv4 address.