Which three types of OSPF route entries can be found in the routing table of an internal OSPF router

Which three types of OSPF route entries can be found in the routing table of an internal OSPF
router within an OSPF stubby area? (Choose three.)

A.
O E2

B.
O IA

C.
O* IA

D.
O E1

E.
O

F.
O N1