Which method would you adopt to achieve this objective?

Some non-DBA users in your database have been granted ANY TABLE system privileges and they are able to access data dictionary base tables. You decide to restrict their access to data dictionary objects.
Which method would you adopt to achieve this objective?

A.
Set the value of the OS_ROLES parameter to TRUE.

B.
Revoke the RESOURCE role from the users.

C.
Grant ANY TABLE system privileges again without ADMIN OPTION.

D.
Use Database Resource Manager to restrict user access to objects.

E.
Set the value of the O7_DICTIONARY_ACCESSIBILITY parameter to FALSE.