A Windows Communication Foundation (WCF) service has a callback contract. You are
developing a client application that will call this service. You must ensure that the client
application can interact with the WCF service. What should you do?
A.
On the client, use GetCallbackChannel<T>.
B.
On the OperationContractAttribute, set the AsyncPattern property value to true.
C.
On the OperationContractAttribute, set the ReplyAction property value to the endpoint
address of the client.
D.
On the client, create a proxy derived from DuplexClientBase<TChannel>.
Explanation: