Refer to the exhibit.

R1 and R2 are failing to establish a BGP neighbor relationship.
What is a Possible reason for the problem?

A.
The neighbor remote-as command on R2 uses an incorrect AS number

B.
The BGP timers on R1 and R2 are different

C.
R2 is configured with a private AS

D.
The no synchronization command is missing from R1’S configuration

E.
The dbgp-multihop values on R1 and R2 are different

F.
The no auto-summary command is missing from R2’S configuration.