A user is present when a technician is troubleshooting their workstation. They insist on showing the technician, step by step, what occurred. How should the technician deal with this situation? ()

A、 Allow the user to demonstrate expertise.
B、 Do not argue; empathize with the user, and offer to help.
C、 Ask the user to watch as the technician diagnoses and corrects the problem.
D、 Document each of the steps to replicate at a later time.