Which three requirements are necessary for two OSPFv2 routers to form an adjacency? (Choose three.)
A. The OSPF hello or dead timers on each router must match.
B. The link interface subnet masks must match.
C. The OSPFv2 process ID must be the same on each router.
D. The two routers must include the inter-router link network in an OSPFv2 network command.
E. The OSPFv2 process is enabled on the interface by entering the ospf process area-id command.
F. The link interface on each router must be configured with a link-local address.