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