What is the correct hierarchy in the Documentum object model?

A.
dm_folder inherits from dm_cabinet, which inherits from dm_sysobject.

B.
dm_sysobject inherits from dm_document.

C.
dm_document inherits from dm_folder, which inherits from dm_sysobject.

D.
dm_category inherits from dm_folder, which inherits from dm_sysobject.