For which of the following requirements might you use a dynamic repository variable?

For which of the following requirements might you use a dynamic repository variable?

A.
You need to control access to a subject area.

B.
You need to limit the record that a user sees depending on the user’s region.

C.
You need to assign permission on web catalog objects.

D.
You need to apply a filter on a report that always returns data for the current year.

E.
You need to populate the title of a report with the ID of the user generation the report