问题：

[单选]

You are working with a Windows Communication Foundation (WCF) client application that has a generated proxy named SampleServiceProxy.When the client application is executing, in line 04 of the following code, the channel faults (Line numbers are included for reference only.)
01 SampleServiceProxy proxy = new SampleServiceProxy();
02 try
03 {
04 proxy.ProcessInvoice(invoice);
05 }
06 catch
07 {
08 if(proxy.State == CommunicationState.Faulted)
09 {
10 ...
11 }
12 }
13 proxy.UpdateCustomer(customer);You need to return proxy to a state in which it can successfully execute the call in line 13.Which code segment should you use at line 10?（）

A . proxy.Close();
B . proxy = new SampleServiceProxy();
C . proxy.Abort();
D . proxy.Open()