Which URL should the administrator use to bypass SSO when logging into the cell?

An administrator has configured Single Sign-On for a vCloud Director cell named Cell01.
Which URL should the administrator use to bypass SSO when logging into the cell?

A.
http://cell01/cloud/login.php

B.
http://cell01/cloud/login.jsp

C.
http://cell01/cloud/login.html

D.
http://cell01/cloud/admin.htm