You are designing a Windows Azure application that will include two web roles.  The web roles will communicate with on-premise development computers and on-premise databases.  Web Role 1 must connect to development computers and databases.  Web Role 2 must connect to only databases.  What should you recommend？（）

A.Create one endpoint group thatcontains the development computers and one endpoint group that contains the databases. Connect Web Role 1 to both endpoint groups. Connect Web Role 2 to only the database endpoint group.

B.Create one endpoint group that contains the development computers and databases. Connect Web Role 1 and Web Role 2 to the endpoint group.

C.Create one endpoint group that contains the development computers and one endpoint group that contains the databases. Connect the endpoint groups. Connect Web Role 1 and Web Role 2 to the development computer group.

D.Create one endpoint group that contains the development computers and databases， and connect it to Web Role 1.  Create one endpoint group that contains only the databases， and connect it to Web Role 2.