You are a technician at Certkiller .com. You have been called to a user, who works from home, in
order to help her with an ADSL connection. What is the FIRST thing you should do when you
arrive on-site?

A.
ask the user if you can install an upgraded firmware to improve performance.

B.
ask is the user has a clue about what the problem might be.

C.
ask whether the user is ready to work on the problem.

D.
swap the faulty ADSL modem with a known-good modem.

Explanation:
You have to know that the user has the time and possibility to let you start the troubleshooting
without having to run away in a short moment.