Which line from the story reveals montresor’s true intentions in his dealings with fortunato?

"the earliest indication i had of this was a low moaning cry from the depth of the recess.…"

"'we will go back; you will be ill, and i cannot be responsible.'"

"i had finished a portion of the last and the eleventh; there remained but a single stone to be fitted and plastered in."

"'true,' i replied; 'the amontillado.'"