Internet Protocol version 6 （IPv6） is the next-generation Internet Layer protocol for packet-switched internetworks and the Internet. IPv6 router solicitation is（）

• A、A request made by a node for the IP address of the local router
• B、A request made by a node to join a specified multicast group
• C、A request made by a node for a DHCP provided IP address
• D、A request made by a node for the IP address of the DHCP server