In the admin GUI, you navigate to "System" > "Status" > "Active Users". You see several buttons, including "Delete Session", "Delete All Sessions". "Refresh Roles", and "Disable All Users".Which two statements are true?（）

• A、To forcibly sign out a single user, you should select the check box next to that user's login name, then select "Delete Session".
• B、If you select "Delete All Sessions", all users are forcibly signed out and are unable to sign in again until "Enable All Users" is selected.
• C、Selecting "Disable All Users" prevents users from signing in and starting a new session, but does not forcibly sign out any users that already have an existing session.
• D、Selecting "Refresh Roles" re-evaluates authentication policies, role-mapping rules, and resource policies for all existing user sessions.