All of the following are true of access control lists, except:

A$.$ some access control entries $($ACEs$)$ create permissions conflicts.

B$.$ an object access control list $($ACL$)$ may have multiple access control entries $($ACEs$)$ associated with it$.$

C$.$ a system access control list $($SACL$)$ is usually established by the system itself.

D$.$ a discretionary access control list $($DACL$)$ is set up by the owner of an object