单项选择题
You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application consumes a Microsoft Windows Communication Foundation （WCF） service.
The WCF service exposes the following method：
[WebInvoke]
string UpdateCustomerDetails（string custID）；
The application hosts the WCF service by using the following code segment：
WebServiceHost host = new WebServiceHost（typeof（CService）， new
Uri（"http：//win/"））；
ServiceEndpoint ep = host.AddServiceEndpoint（typeof（ICService），
new WebHttpBinding（）， ""）；
You need to invoke the UpdateCustomerDetails method.
Which code segment should you use？ （）
A.A
B.B
C.C
D.D
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