单项选择题

A.appcmd add site /name:sl /physicalPath:c:\websites\sl
B.appcmd set vdir /vdir.name:sl /path:/sl /physicalPath:c:\websites\sl
C.appcmd add app /app.name: Cer-tech /path:/sl /physicalPath:c:\websites\sl
D.appcmd add vdir /app.name: Cer-tech /path:/sl /physicalPath:c:\websites\sl
E.None of the above