Question:You create a method that runs by using the credentials of the end user. You need to use Microsoft Windows groups to authorize the user. You must add a code segment that identifies whether a user is in the local group named Clerk. Which code segment should you use?
A WindowsIdentity currentUser = WindowsIdentity.GetCurrent(); foreach (IdentityReference grp in currentUser.Groups) { NTAccount grpAccount =
((NTAccount)grp.Translate(typeof(NTAccount))); isAuthorized = grpAccount.Value.Equals(
Environment.MachineName + @"\Clerk");
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if (isAuthorized) break;
}B WindowsPrincipal currentUser =
(WindowsPrincipal)Thread.CurrentPrincipal;
isAuthorized = currentUser.IsInRole(
Environment.MachineName);C WindowsPrincipal currentUser =
(WindowsPrincipal)Thread.CurrentPrincipal;
isAuthorized = currentUser.IsInRole("Clerk");D GenericPrincipal currentUser =
(GenericPrincipal) Thread.CurrentPrincipal;
isAuthorized = currentUser.IsInRole("Clerk");
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