You are modifying a Windows Communication Foundation (WCF) service that provides
access to report generation system. The following code segment is part of your service
contract. (Line numbers are included for reference only.) Client applications are blocked
while the service processes reports. You need to ensure that the service methods are
asynchronous. What should you do?

A.
Insert the following code at line 04. [OperationContract] Insert the following code at line
07. [OperationConcracc(AsyncPactern = true)]

B.
Insert the following code at line 04. [OperationConcracc(AayncPaccern = true)]

C.
Insert the following code at line 04. [OperotionConcroct(AsyncPactern = false) Insert the
following code at line 07. [OperacionConcracc(AsyncPactern = true)]

D.
Insert the following code at line 04. [OperationContract (AsyncPattern = false)]