Which minimum configuration for a Cisco Unified Communi…

Refer to the exhibit:

The exhibit shows a SAF Forwarder configuration attached to a Cisco Unified Communications Manager.
Which minimum configuration for a Cisco Unified Communications Manager Express SAF Forwarder is needed to establish a SAF neighbor relationship with this
SAF Forwarder?

A.
router eigrp SAF
i
service-family ipv4 autonomous-system 1
!
topology base
exit-sf-topology
exit-service-family
voice service saf
profile trunkroute 1
session protocol sip interface Loopback1 transport tcp port 5060
!

B.
router eigrp SAF
!
service-family ipv4 autonomous-system 1
!
topology base
exit-sf-topology
exit- service-family
!
voice service saf
profile trunk-route 1
session protocol sip interface Loopback1 transport tcp port 5060
!
profile dn-block 1 alias-prefix 1972555
pattern 1 type extension 4xxx
!
profile callcontrol 1
dn-service
trunk-route 1
dn-block 1
dn-block 2
!
channel 1 vrouter SAF asystem 1
subscribe callcontrol wildcarded
publish callcontrol 1
!

C.
router eigrp SAF
!
service-family ipv4 autonomous-system 1
!
topology base
exit-sf-topology
exit-service-family
!

D.
None of above configurations contain sufficient information.

Explanation:
Incorrect answer: A, B, D

only following configuration is enough
router eigrp SAF
service-family ipv4 autonomous-system 1
exit-service-family
link: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6554/ps6599/ps10822/whitepaper_c11-636604.html