You develop a Windows Communication Foundation (WCF) service that employees use to access bonus information. You define the following service contract. (Line numbers are included for reference…

You develop a Windows Communication Foundation (WCF) service that employees use to access bonus information. You define the following service contract. (Line numbers are included for reference only.) 01 <ServiceContract(SessionMode:=SessionMode.Required)> 02 Public Interface IFinancialService 04 <OperationContract()> 05 Function Login( ByVal employeeID As Integer, ByVal passwordHash As String) As String 07 <OperationContract()> 08 Function GetBonus(ByVal month As Integer) As Double 10 <OperationContract (IsTerminating:=True)> 11 Sub Logout() 13 End Interface Client applications can invoke methods without logging in. You need to ensure that the client applications invoke Login before invoking any other method. You also need to ensure that client applications cannot consume the service after invoking Logout. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)