Which two commands are required for basic OSPF configuration?

• A. “[network mask] area [area-id]” and “router ospf [process-id]”
• B. “[wildcard-mask] area [area-id]” and “[network mask] area [area-id]”
• C. only “router ospf [process-id]”
• D. “[wildcard-mask] area [area-id]” and “router ospf [process-id]”