Read the following description from The Red Badge of Courage.
"He could not conciliate the forest. As he made his way, it was always calling out protestations. When he separated embraces of trees and vines, the disturbed foliages waved their arms and turned their face leaves toward him."
This description best supports which of the following central ideas?
A. honor and reputation
B. the definition of courage
C. growing from a boy into a man
D. the insignificance of man in nature