【单选题】
You plan to host a Windows Communication Foundation （WCF） service in a Windows Azure worker role. <br /> Custom code is necessary to initialize and configure the service endpoint.  <br /> You need to recommend the point at which the application should initialize the WCF service. <br /> What should you recommend？（）
A、 When Windows Azure initializes the worker role instance.
B、 When the worker role instance receives its first request.
C、 When the worker role instance instantiates the WCF service.
D、 When the worker role instance enters the main execution thread.
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