Which is correct about OSPF AS-External-LSA? (Multiple choices)

Which is correct about OSPF AS-External-LSA? (Multiple choices)

A. Link State ID is set as the destination network segment address.

B. Advertising Router is set to ASBR Router ID.

C. Net mask is set to all 0.

D. Link State ID and the Advertising Router can uniquely identify an AS-External-LSA.

Answer: AB