You install the Web Server （IIS） role on a server that runs Windows Server 2008. Your companys human resources department has a Web site named www.contoso.com/hr.  You need to create a virtual directory on the company Web site for the HR department. Which command should you run on the Web server？（）

• A、appcmd add app /app.name：contoso /path：/hr /physicalPath：c：/websites/hr
• B、appcmd add site /name：hr /physicalPath：c：/websites/hr
• C、appcmd add vdir /app.name：contoso /path：/hr /physicalPath：c：/websites/hr
• D、appcmd set vdir /vdir.name：hr /path：/hr /physicalPath：c：/websites/hr