Select the correct answer.

Which literary device is employed in the following sentence from Herman Melville's short story "Bartleby, the Scrivener"?

"And here Bartleby makes his home, sole spectator of a solitude which he has seen all populous—a sort of innocent and transformed Marius brooding among the ruins of Carthage!"

A. allegory
B. irony
C. allusion
D. symbolism