Which statement about OSPF loop prevention is true?

Which statement about OSPF loop prevention is true?

A.
The discard route is generated automatically on the ABR to prevent routing loops.

B.
The ASBR uses type 3 LSAs from non-backbone areas to prevent control-plane routing loops.

C.
The ABR can filter type 3 LSPs to prevent routing loops.

D.
The DN bit ignores LSA types 2, 3, and 5 to prevent routing loops.