A、In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the router service. B、In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the target service. C、In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the target service. D、In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the router service.