You manage a member server that runs Windows Server 2008. The server runs the Terminal Server Gateway （TS Gateway） role service. You need to find out whether a user named User1 has ever connected to his office workstation through the TS Gateway server. What should you do？（）
- AView the events in the Monitoring folder from the TS Gateway Manager console.
- BView the Event Viewer Security log.
- CView the Event Viewer Application log.
- DView the Event Viewer Terminal Services-Gateway log.