Select the correct inference of the given passage from “the cask of amontillado.”
“against the new masonry i re-erected the old rampart of bones. for the half of a century no mortal has disturbed them. in pace requiescat! ”
a) montresor spent fifty years building the wall.
b) fortunato has never been found.
c) montresor buried all of the old bones.
d) fortunato has been sleeping for fifty years.