The correct option is
D All of these
Some precaution to be taken while using electricity:
1. DON'T plug a bunch of stuff into one outlet or extension cord.
It could damage the electrical system in your house or even cause a fire.
2. DO ask grown-ups to put safety caps on all unused electrical outlets.
Covering outlets will also help save energy by stopping cold drafts.
3. DON’T yank an electrical cord from the wall.
Pulling on a cord can damage the appliance, the plug or the outlet.
4. DO make sure all electric cords are tucked away, neat and tidy.
Pets might chew on electrical cords, and people might trip and fall.
5. DON'T ever climb the fence around an electrical substation.
If a ball or pet gets inside the fence, ask a grown-up to call the electric company - they'll come and get it out for you.
6. DO look up and look out for power lines before you climb a tree.
The electricity can go right through the tree branch - and right through you!
7. DON’T fly a kite near power lines.
The kite and the string may conduct electricity – sending it right through you to the ground.