You have a file server that runs Windows Server 2008. The server has a shared folder. You need to receive a notification when a user stores more than 500 MB of data in the shared folder. You must allow users to store more than 500 MB 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.