Which two statements about DS-Lite are true？（）

• A、IPv4 packets are carried over IPv6 tunnels to the LSN while IPv6 traffic is forwarded natively.
• B、Ipv6 packets are carried over IPv4 tunnels to the LSN while IPv4 traffic is forwards natively.
• C、The LSN performs NAT44 on private IPv4 source addresses.
• D、DS-Lite does not perform any address translation.