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.
