You are developing an application that performs file backups in the backgrounD.The background application will host a Windows Communication Foundation (WCF) service and must be active as soon as the machine is running. The background application will not have a user interfacE.A front-end application will consume the WCF service and will provide the user interfacE.You need to choose a host environment for the WCF servicE.Which hosting environment should you choose? （） A.Microsoft Internet Information Services (IIS) 6.0 B.Windows Process Activation Services (WAS) C.A Windows Forms application D.A Windows Service