Thoreau, an important Transcendentalist, believes that people need to live an honest life. This can be applied to McCandless because he lived a few years of his life with nearly nothing. He disposed of all of his possessions because he simply thought they were unimportant in life.
An abstract concept is difficult to understand because of the unspecific character that is obtained from it.
The sentence that most effectively translates the abstract concept into a mental picture is option C. (Rumors) Whispers od doubt filled the empty halls like the reek of rotten eggs.