I would Choose D because A is not correct because the librarian doesnt do that kind of stuff they just help find books It cannot be B because The internet can always be sus and not always have what you are looking for Its not C Because of the same reason for why B is not the correct answer Hope this helped :D
I am pretty sure it is D but not 100% sure
D.Going much slower
compensating for speed.
It would give the tone of their voice when speaking