Which of the Following Statements Regarding BGP Route Reflectors (RRs)

Which of the following statements regarding BGP route reflectors (RRs) are true?

A) If no RR is available, IBGP peers must be fully meshed. If an RR is available, IBGP peers do not need to be fully meshed
B) An RR can advertise routes learned from a client to the other clients and non-clients
C) An RR can advertise routes learned from IBGP peers to all clients and non-clients
D) An RR can advertise routes learned from non-clients to all clients