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单项选择题 You are developing a Windows Communication Foundation (WCF) service. You enable logging in the configuration file. The opening tag is defined as follows. logMalformedMessages="true" logMessagesAtServiceLevel="true" logMessagesAtTransportLevel="true" maxMessagesToLog="20"> You need to ensure that logging is implemented so that only messages with SOAP headers are logged. What should you add to the filters element of the application configuration file?（）

A、

B、

C、

D、

  • C

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