A repository has two custom object types:
my_sop, which is a subtype of dm_document
my_user, which is a subtype of dm_user
An object in this repository has the object ID 09001b3f80004d73.
What is the type of the object?

A.
my_sop only

B.
dm_user only

C.
dm_document only

D.
my_sop or dm_document

Explanation: