you would have to call all of them, so d.
I believe the answer is Virtual Private Network (VPN).
Know this answer is late, but im doing my deed hoping i this can help someone else pass this darn class. Best of Luck to whoever is taking the same course. You can do it if my lazy self can do it! It'll be okay ;)
It’s obviously C.Signaling your intent by using your blinkers also known as the lights at the back of your car!