Hello,
the answer is for sure A.) <span>It creates an open environment where participants admit they do not know certain things.
Because look, If you think about it, When somebody is asking you or considering you a question, you either have one thing like you know the answer or you have the chance to learn something new.
I hope this helps</span>
The author introduces very key details to the story to help introduce the ideas of September 11th
The correct answer is Biological fact
