You are developing an application that will use custom authentication and role-based security. You need to write a code segment to make the runtime assign an unauthenticated principal object to each running thread. Which code segment should you use?

You are developing an application that will use custom authentication and role-based
security.
You need to write a code segment to make the runtime assign an unauthenticated principal object
to each running thread.
Which code segment should you use?

A. Dim objDomain As AppDomain =
    AppDomain.CurrentDomainobjDomain.SetPrincipalPolicy( _
    PrincipalPolicy.WindowsPrincipal)
B. Dim objDomain As AppDomain =
    AppDomain.CurrentDomainobjDomain.SetThreadPrincipal(New
    WindowsPrincipal(Nothing))
C. Dim objDomain As AppDomain =
    AppDomain.CurrentDomainobjDomain.SetAppDomainPolicy( _
    PolicyLevel.CreateAppDomainLevel())
D. Dim objDomain As AppDomain =
    AppDomain.CurrentDomainobjDomain.SetPrincipalPolicy( _
    PrincipalPolicy.UnauthenticatedPrincipal)

Answer: D