Select the choice which best identifies the given passage from "The Cask of Amontillado."
"The nitre!" I said; "see, it increases. It hangs like moss upon the vaults. We are below the river's bed. The drops of moisture trickle among the bones." (4 points)

Select one:
a. Irony/sarcasm
b. Characterization
c. Setting
d. Tragic resolution