Read "Grass" by Carl Sandburg:

"Pile the bodies high at Austerlitz and Waterloo.
Shovel them under and let me work—
I am the grass; I cover all.
And pile them high at Gettysburg
And pile them high at Ypres and Verdun.
Shovel them under and let me work.
Two years, ten years, and the passengers ask the conductor:
What place is this?
Where are we now?
I am the grass.
Let me work."

Which statement best describes the speaker's tone in this poem?

A. The references to Ypres, Gettysburg, and other major battles are all examples of allusion that conjure images of war.
B. The conductor's vast knowledge about the major battles shows that, however many lives were lost, the sacrifices were not in vain.
C. The grass, through lines such as "I cover all," is regretful about hiding the aftermath of terrible historical events like the battles listed.
D. The repeated statements "I am the grass" and "Let me work" show the speaker's pride but also his indifference toward the events described.