Answer:
<h2>Whenever you work around them.</h2>
Step-by-step explanation:
The second option is the best, because that depends on yourself.
If you wait for a qualified person to determine danger, and you don't have that person near, you cannot just ignore the situation. If you only consider only where there have been accidents, then probably you will have one, because those stats don't make you more secure. If you have extreme cation when you work with cranes, then you would have accidents with the absence of it.
You see, all options are not viable, because they let you vulnerable. The only person you can rely is you, your are the one that have to exercise extreme caution, whenever you are around power lines. It doesn't matter if you aren't working with cranes, or if there's no qualified person. You ALWAYS have to exercise extreme caution.
