Which of the following best identifies a theme of the text?
Nature’s first green is gold,
Her hardest hue to hold.
Her early leaf’s a flower;
But only so an hour.
Then leaf subsides to leaf.
So Eden sank to grief,
So Dawn goes down to day.
Nothing gold can stay.
A. It's dangerous to forget that we will die at some point
B. Love is unpredictable and inconsistent
C. The most beautiful moments in life are brief
D. Perfection and paradise are unattainable