Erin has created a categorized view in her Human Resources database that supports unread marks. When users access the view and try to expand some categories, no documents appear even though the users see unread marks beside the category.
Which one of the following could be the problem?
A. The documents include Reader names fields.
B. The database needs to be replicated.
C. The missing documents in the category have been soft deleted from the database.
D. The view has an old index and must be reindexed.