Refer to the EBGP configuration on a PE IOS-XR router exhibit.
router bgp 65001 address-family ipv4 unicast network 172.16.1.0/24 network 192.168.1.0/24 ! neighbor 10.1.1.1 remote-as 65002 !
After the EBGP configuration, no routes are accepted from the EBGP peer, nor are any routes advertised to the EBGP peer.
What could be the problem?

A.	The update-source neighbor configuration command must also be configured
B.	The next-hop-self neighbor configuration command must also be configured
C.	EBGP neighbors must have an inbound and outbound route policy configured
D.	An access list is blocking IP protocol 179 packets between the two EBGP peers
E.	The maximum-prefix neighbor configuration command must also be configured