An administrator enabled the Pre-auth check for their guest self-registration. At what stage in
the registration process is this check performed?

A.
Before the user self-registers.

B.
After the user self-registers; before the user logs in.

C.
After the user logs in; before the NAD sends an authentication request.

D.
After the user logs in; after the NAD sends an authentication request.

E.
When a user is re-authenticating to the network.