B. And unlike a neighborhood, where one usually has a general knowledge of others who live in the area, social networking sites are gatherings of [cut-off] individuals, none of whose personal boastings and musings are necessarily trustworthy.
It has to be a simile because it uses the term “as” but idk why it’s not in the answers
I think that the answer should be d. Believe it or not Joe, it is time for us to leave.
