Your company has computers in multiple locations that use IPv4 and IPv6. Each location is protected by a firewall that performs symmetric NAT. You need to allow peer-to-peer communication between all locations. What should you do？ （）

A.Configure dynamic NAT on the firewall

B.Configure the firewall to allow the use of Teredo

C.Configure a link local IPv6 address for the internal interface of the firewall

D.Configure a global IPv6 address for the external interface of the firewall