The first alternative is correct (A).
The text talks about virus infection on a person's computer, which can be monitored from there.
That is, the passage has a specific subject whose exchange of experiences can contribute to a better understanding of the problem. In this context, the interlocutor can, for example, tell a particular experience in which he or she had to deal with a virus in his computer, giving details of what happened and how it was solved.
Can you put up the passage? We can’t see anything?
I think he was the bad he was very selfish and rude
C is the answer to the question
