Read this sentence from the novel Grendel: I felt laughter welling up inside me — at the dragon-charm, at Hrothgar's whispering and trembling by the meadhall door, at everything — the oblivious trees and sky, the witless moon.The author most likely uses the word oblivious to create a tone of _____.A. realismB. humanityC. peacefulnessD. indifference