Which configuration elements must match for adjacent ne…

Refer to the exhibit.

Which configuration elements must match for adjacent neighbors to establish a SAF neighbor relationship?

A.
the label name specified in the router eigrp command

B.
the autonomous-system number specified in the service-family ipv4 autonomous-system command

C.
the sf-interface configuration

D.
the topology base configurations

E.
the label name specified in the router eigrp command and the autonomous-system number

Explanation:
Incorrect answer: A, C, D, E

service-family ipv4 autonomous-system 1 enables a Cisco SAF service family for the specified autonomous system on the router
Link: http://www.cisco.com/en/US/docs/ios/saf/configuration/guide/saf_cg_ps10591_TSD_Products_Configuration_Guide_Chapter.html#wp1056363