Analysis: (1) Option AB: An organ under the local people's government exercises the right to organize and manage all administrative affairs in a certain area according to law, and can conduct administrative actions in its own name and bear legal responsibility for the consequences of its actions, so it has the qualification of administrative subject;
(2) Option C: Organs belonging to government functional departments, authorized by laws and regulations, have obtained the qualification of administrative subject and become administrative subjects within the scope of authorization, such as police stations, industrial and commercial offices, etc.
(3) Option D: Internal institutions affiliated to administrative organs can become administrative subjects under the authorization of laws and regulations, such as the Trademark Office in the State Administration for Industry and Commerce and the Patent Reexamination Board in the State Patent Office;
(4) Option E: The entrusted organization can only exercise administrative power in the name of the entrusting organ, so the entrusted organization does not have the qualification of administrative subject and does not belong to administrative subject.