The anwser is %75 im adding extra words cause it has to be atleast 20 characters lol
Capital of the republic of turkey
I would say the first option. "river knows. I from man conceal". To me says nature knows but he's hiding it from people.
C. an understood you, because usually you is the subject in the sentence, but it is understood without it.
The correct answer is C. Hope that helps :)