Most times the average citizen knows what they've been taught on chronic illnesses from tv shows, teachers, co workers maybe, etc. Theres no telling what each and every citizen knows on it. I dont know if this was a personal question or if you were looking for something specific but i hope this helps?
They are most mainly consists of "Keratin"
So, option B is your answer.
Hope this helps!
For me it is
not blinking
and leaning in slightly.
