Which two steps are needed when configuring multiple RPs using MSDP within a single PIM domain? （）

• A、Configure a non-unique address on the loopback interface for use by the PIM RP.
• B、Configure MSDP with the unique address (router ID) as the local address of the peer.
• C、Configure MSDP with the non-unique address (router ID) as the local address of the peer.
• D、Configure a unique address on the loopback interface, used as the PIM RP.