R3 and R4 are Route-Reflectors and there is an I-BGP session between them, there is NO I-BGP session between R1 and R2. For an External Route from CE-2 in R2 to reach R1, which two statements are true? (Exhibit)
A.
R1, R3 and R4 establish full mesh I-BGP sessions, R2, R3 and R4 establish full mesh I-BGP 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 R4, R2 acts as a Route-Reflector client to R3.
D.
CE-2 establishes multi-hop E-BGP sessions with R3 and R4.