R3 and R4 are Route-Reflectors and there is an iBGP session between them, there is NO iBGP
session between R1 and R2. For an External Route from CE-2 in R2 to reach R1, which two
statements are true?

A.
R1, R3 and R4 establish full mesh iBGP sessions, R2, R3 and R4 establish full mesh iBGP sessions.

B.
R1 acts as a Route-Reflector client to R3, R2 acts as a Route-Reflector client to R4.

C.
R1 acts as a Route-Reflector client to R4, R4 acts as a Route-Reflector client to R3, R2 acts as
a Route-Reflector client to R3.

D.
CE-2 establishes multi-hop E-BGP sessions with R3 and R4.