Refer to the exhibit.
An EBGP session is not established between Router1 and Router2.
A.
The ebgp-multihop value must be increased to 3.
B.
A static route needs to be added on Router1 and Router2.
C.
The update-source loopback 0 command needs to be removed.
D.
Use the serial interface IP addresses in the neighbor command, but leave the update source
pointing to loopback 0.