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？（）

You are designing a strategy for synchronizing a SQL Azure database and multiple remote Microsoft SQL Server 2008 databases. 
The SQL Azure database contains many tables that have circular foreign key relationships.  You need to recommend an approach for ensuring that all changes in the remote databases synchronize with the SQL Azure database. 
What should you recommend？（）