Question: how to change a lightbulb

  Options: 
 A. Leave the power on so you will know if new bulb works Allow The Bulb To Cool, Use A Ladder if necessary, Remove The Old Bulb, Insert The Replacement Bulb, Switch On The Power, Dispose Of Your Old Bulb.
 B. Turn Off The Power. Never attempt to change a light bulb with the power still connected. Allow The Bulb To Cool, Use A Ladder if necessary, Remove The Old Bulb, Insert The Replacement Bulb, Switch On The Power, Dispose Of Your Old Bulb.
Answer: B