Cyberstalking could be used to find individual’s personal information or even something so harmless seeming such as their feeling or location, but it could actually impact the person greatly. With all the technology available to the cyberstalker, and the information of the individual available, it gives them the opportunity to manipulate or harm the individual, etc.
It's the second one because I just got doing this and it was right.
I would say that d is the least effective choice because it is broad, has little detail, and has no proof. Many people would say c, but unlike d, c has proof to what you are trying to say.