You are designing a Windows Azure application that will execute long-running business processes.  Applying a configuration change requires role instances to recycle. You must not recycle until processing is finished.  You need to recommend an approach for applying configuration changes.  What should you recommend？（）

• A、 Apply the service configuration changes to the role instance and then recycle the role instance.
• B、 Suspend each role instance and then apply the service configuration changes to the role instance.
• C、 Before a change to the service configuration is applied to the role instance， defer recycling until processing is complete.
• D、 After a change to the service configuration is applied to the role instance， defer recycling until processing is complete.