Refer to the exhibit. All routers within an AS are configured with anycast RP and with the same MSDP mesh group. Considering that the MSDP peers in a mesh group are fully mesh, which statement about this configuration is true?
A. Inter-AS MSDP mesh groups must not be configured between Inter-AS routers.
B. Unicast BGP is checked first and then MBGP for RPF Check if both are configured.
C. When R3 receives an SA message from R1, R3 forwards the SA message to R2, R4, and R5.
D. The SA message received from AS 65001 is not forwarded back to AS 65001 by R3.
