Select the correct inference of the given passage from "The Cask of Amontillado."
"I continued, as was my wont, to smile in his face, and he did not perceive that my smile now was at the thought of his immolation."
Select one:
a. The narrator wishes to reveal his hatred for his victim.
b. The narrator continues to smile at his victim.
c. The narrator has plotted his revenge in secret.
d. The narrator is a friendly person to all.