What is the correct virtual link configuration on an OSPF router？（）

A、area 0.0.0.0{ linkneighbor-id 172.168.18.2 transit-area 0.0.2.1；}

B、area 0.0.0.0{ virtual-linkneighbor-id 172.168.18.2 transit-area 0.0.2.1；}

C、area 0.0.0.1{ virtual-linkneighbor-id 172.168.18.2 transit-area 0.0.2.1；}

D、area 0.0.2.1{ virtual-linkneighbor-id 172.168.18.2 transit-area 0.0.0.0；}