Which three functions are performed by an OSPF area border router (ABR)?

Which three functions are performed by an OSPF area border router (ABR)? (Choose three)

A.
flooding Summary LSAs to connected areas

B.
flooding ASBR Summary LSAs to connected areas

C.
generating all Router LSAs for connected neighbors

D.
performing summarization on routes headed to Area 0

E.
flooding NSSA External LSAs to Area 0