Which configuration error prevents the ASBR from establishing a BGP neighborship to a directly connected BGP speaker?

Refer to the exhibit.

An engineer is trying to implement BGP configuration on a router .

Which configuration error prevents the ASBR from establishing a BGP neighborship to a directly connected BGP speaker?
A . The routing policy is absent for this Cisco IOS XR eBGP instance.
B . The IPv4 address family configuration under neighbor configuration-mode must be removed.
C . The VPNv4 address family interferes with the 8GP IPv4 address family negotiations.
D . The TCP session parameters are not specified.

Answer: A

Explanation:

https://www.cisco.com/c/en/us/td/docs/routers/xr12000/software/xr12k_r41/routing/configur

ation/guide/routing_cg41xr12k_chapter1.html

bgp router-id comes under TCP session parameters