At minimum, which columns in the database are used to join a subtype with its dm_sysobject supertype?
A. object_name for the _s tables, r_object_id and r_version_label for the _r tables
B. authors for the _s tables, r_object_id and i_position_id for the _r tables
C. r_object_id for the _s tables, r_object_id and i_position_id for the _r tables
D. r_object_id for the _s tables, r_object_id and keywords for the _r tables