【单选题】
You are designing a Windows Azure application that will generate events for multiple clients. Client web services might be behind NAT gateways. <br /> You need to recommend an approach that will allow you to broadcast the events to clients. <br /> What should you recommend？（）
A、 Use ADO.NET Data Services and provide a shared key to clients.
B、 Use Windows Azure Queues and provide a shared key to clients.
C、 Use Windows Azure Table storage and providea shared key to clients.
D、 Use the Windows Azure AppFabric Service Bus and provide a shared secret to clients.
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