You are designing a Windows Azure application.  The application will include occasionally connected clients that reference data stored in Windows Azure Blob storage.  The clients will be able to add data while disconnected.  You need to recommend an approach for synchronizing offline client data with Windows Azure Blob storage.  What should you recommend？（）

• A、 Use SQL Azure Data Sync.
• B、 Use the Microsoft Sync Framework.
• C、 Use Windows Azure Blobstorage snapshots.
• D、 Use the Microsoft SQL Server replication component.