The answer is C. automated external defibrillator
Probably breast cancer scanning, or a Mammogram.
Explanation:
~~I just know~~
Because it makes things easier like getting a reservation. It also promotes apps and makes it easier to share what you like with other people. I hope this helps!
They can if they want to, but if they do they will infect whoever they are doing it with. No one can stop them. But if you are looking for a definitive answer then no, it is not okay at all because of the risk they are putting other people at. Especially because STDs are with you forever, they never go away.
Hope this helps!!