A、It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network

B、It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router

C、It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network

D、It is used to determine which interfaces will send Hello packets to neighboring OSPF routers