Which statement about OSPF ASBR summary LSA is true？（）

• A、It is generated by an ASBR and indicates the reachability to an ABR located in another area.
• B、It is generated by ABR and indicates the reachability to an ASBR located in another AS.
• C、It is generated by ABR and indicates reachability to itself.
• D、It is generated by ABR and indicates the reachability to an ASBR located in another area.
• E、It is generated by ASBR and indicates the reachability to an ABR.