Read the peom "There will Come Soft Rain" by Sara Teasdale (1884-1933). Which is the best restatement of the theme of the poem?

There will come soft rains and the smell of the ground,
And swallows circling with their shimmering sound;
And frogs in the pools singing at night,
And wild plum trees in tremulous white,
Robins will wear their feathery fire
Whistling their whims on a low fence-wire;
And not one will know of the war, not one
Will care at last when it is done.
Not one would mind, neither bird nor tree
If mankind perished utterly;
And Spring herself, when she woke at dawn,
Would scarcely know that we were gone.

A. Humanity needs nature to survive
B. Humans will destroy the world
C. Nature is the enemy of humanity
D. Nature will endure even if humans do not