You are troubleshooting OSPF neighbor establishment problems, which are
occurring over Frame Relay interfaces that use the default OSPF network type. What should you verify in the router configuration?

A.
the ip ospf network point-to-point statement under the Frame Relay interface

B.
the ip ospf priority 0 statement on the Frame Relay interface on the designated router

C.
the neighbor statements on the Frame Relay interface

D.
the frame-relay map statement on the Frame Relay interface