Refer to the diagram. What should be changed within AS 50001 to improve the route reflector design?
Exhibit:
A. Add a physical link between R1 and R2.
B. Add a physical link between the clients (R3 and R4, and between R4 and R5).
C. Remove the IBGP session between the two redundant RRs (R1 and R2).
D. Add an IBGP session between each pair of clients (between R3 and R4, R4 and R5).
E. Make R4 the RR and R1 and R2 its clients. R3 and R5 should be a non-RR/non-client.
