You have a file serve that runs windows server 2008. The serve has a shared folder. You need to receive a notification when a user stores more than 500MB of data in the shared folder. You must allow users to store more than 500MB of data in the shared folder. What should you do?（）

• A、Create a soft quota.
• B、Create a hard quota.
• C、Create an active screening file screen.
• D、Create a passive screening file screen.