I'm assuming that this is out of a passage. I can't answer the question without the passage.
I think the answer is a but if not I am sorry
Children, is the correct answer. If that is not the sentence you told me to look at, you can put it in the comment's
The answer is: the book will bear witness to events that must be known.
"Night" is an autobiographical novel by Elie Wiesel, who accounts his struggle as a prisoner during the Holocaust. He desires to make sure the world acknowledges what happened in concentration camps as he narrates how crude society was and how inhuman even prisoners became towards one another - mostly attemping to survive themselves.