Read the poem "Nothing Gold Can Stay" by Robert Frost. 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.

Which word best matches the meaning of the word "gold" in line 1?

A. Greedy
B. Rare
C. Valuable
D. Yellow