Which change to the corporate Windows 7 client would prevent single sign-on to the infrastructure using the end user's A

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Which change to the corporate Windows 7 client would prevent single sign-on to the infrastructure using the end user's Active Directory account?

A. A Smart Card reader is installed to allow the end user to log on with an X509 certificate issued by the Active Directory Certificate Authority.
B. The workstation has the 'Interactive login: Do not display last user name' policy applied and enforced by Group Policy Object (GPO).
C. The native Windows Receiver is removed and end users can access the environment using the HTML Receiver through a web browser.
D. The Windows workstation is joined to a different domain than where the end user account resides, and the two domains are in the same forest.