You have BPDU Guard configured on an interface. What happens if a BPDU is advertised on the interface?

A. The interface will become administratively disabled.
B. The interface will become disabled.
C. The interface will become err-disabled.
D. A small switching loop will happen until convergence.

C. The switch’s interface will become err-disabled immediately. Once it is in err-disable mode, an administrator is required to reset the interface.