You are provisioning a new customer for access to your Layer 3 VPN. The customer is using
172.16.35.0/24 as their internal IP address space, which is also being used by an existing Layer 3
VPN customer. The two customers share many PE routers in common across your network.
Which mechanism allows these duplicate addresses to exist in your network?

A.
route origin

B.
route target

C.
route refresh

D.
route distinguisher