This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to change a pool light
Shut off all power to the pool lighting.
This will be done at your electrical box. Some swimming pools have been equipped with their own breaker boxes.

Options are: (a). Clear the area of the pool that is near lights. Remove any large rocks, fallen trees, or other debris from the pool, especially under the lights you will be installing on them.. (b). Check to make sure power is off by trying to turn on the pool lights. Not sure about this step...if light is burned out, it will not turn on anyway.. (c). Rotate the pool lights right every 20-30 seconds. If your pool goes dark, reset power to the same water circuit that you drained earlier and then turn your pool lights back on.. (d). Most has a switch that shuts off only water when the wiring is up. If you are right footed, you will get most of your operation done from here..
The answer is:
(b).