The answers each list a tunnel method and two consecutive IPv6 address quartets.Which answers identify a tunneling method that relies on an IPv4 address to be embedded into an IPv6 address, within the correct quartets listed?（）

• A、Automatic 6to4, quartets 2 and 3
• B、Automatic 6to4, quartets 7 and 8
• C、ISATAP, quartets 2 and 3
• D、ISATAP, quartets 7 and 8