In certain sectors of society, saying "most Americans don't understand ... You're part of a generation which has, by and large, become ... at our own levels of knowledge about mental health disorders and see what's lacking
They are most mainly consists of "Keratin"
So, option B is your answer.
Hope this helps!
All of them could be intentional/unpreventable, we are only talking about an injury so I would say the plane crash.
