You are working as a trainee at Certkiller .com. You have been asked to clean all the CRT monitor
screens in the computer lab. Which of the following should you do FIRST?

A.
wipe the screen with a rag soaked in warm water.

B.
unplug the computer.

C.
unplug the monitor.

D.
spray the glass with ammonia based cleaner.

Explanation:
liquids and electrical equipment is generally a bad idea unless the equipment is unplugged.