A company is using 6to4 tunneling within their IPv6 network. Which two statements about this kindof tunneling are accurate？（）

• A、6to4 is a manual tunnel method
• B、Prepending a reserved IPv6 code to the hexadecimal representation of 192.168.0.1 facilitates6to4 tunneling
• C、Each 6to4 site receives a /48 prefix in a 6to4 tunnel
• D、2002：：/48 is the address range specifically assigned to 6to4
• E、Prepending 0x2002 with the IPv4 address creates an IPv6 address that is used in 6to4tunneling