The Border Gateway Protocol (BGP) is the core routing protocol of the Internet. Refer to the exhibit. Routers PGA and PGB are running BGP but the session is active. What command needs to be added to establish the BGP session?

A.
ip route 10.10.10.1 255.255.255.255 s0/0
ip route 10.10.10.1 255.255.255.255 s0/1

B.
no synchronization

C.
network 10.10.10.0

D.
neighbor 10.10.10.1 next-hop-self