Select the correct inference of the given passage from "The Cask of Amontillado."
a. "The thousand injuries of Fortunato I had borne as I best could, but when he ventured upon insult I vowed revenge."
b. Fortunato has been injured many times.
c. The narrator continues to hurt Fortunato and vows revenge.
d. The narrator has been insulted many times and vows revenge against Fortunato.
e. Fortunato has been recently born and goes on an adventure.