Router R1 connects to a Frame Relay cloud using a multipoint subinterface, with ten PVCs associated with the subinterface. What command would make this router not use a DR and require static OSPF neighbor definition?（）

• A、ip ospf network broadcast
• B、ip ospf netw ork non - broadcast
• C、ip ospf network point - to - multipoint
• D、ip ospf network point - to - multipoint non - broadcast