【单选题】
You are designing a Windows Azure application. <br /> The application includes two web roles and three instances of a worker role. <br /> The web roles will send requests to the worker role through one or more Windows Azure Queues. You have the following requirements：  <br /> - Ensure that each request is processed exactly one time.  <br /> - Minimize the idle time of each worker role instance. - Maximize the reliability of request processing.  <br /> You need to recommend a queue design for sending requests to the worker role. <br /> What should you&en
A、 Create a single queue. Send requests on the single queue.
B、 Create a queue for each web role. Send requests on all queues at the same time.
C、 Create a queue for each workerrole instance. Send requests on each worker queue in a round robin.
D、 Create a queue for each combination of web roles and worker role instances. Send requests to all worker role instances based on the sending web role.
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