You are developing a Windows Communication Foundation (WCF) service to replace an
existing A5MX Web service. The WCF service contains the following code segment. (Line
numbers are included for reference only.) The existing Web service returns the EmployeeID
as an attribute of the EmployeeInfo element in the response XML. You need to ensure that
applications can consume the service without code changes in the client.

A.
OPTION B

B.
OPTION C

C.
OPTION A

D.
OPTION D