You are designing a Windows Azure application.   The application includes processes that communicate by using Windows Communications Foundation （WCF） services.  The WCF services must support streaming.  You need to recommend a host for the processes and a WCF binding.   Which two actions should you recommend？（）

• A、 Host the processes in web roles.
• B、 Host the processes in worker roles.
• C、 Use NetTcpBinding for the WCF services.
• D、 Use WSHttpBinding for the WCF services.