Select the correct inference of the given passage from "the cask of amontillado."

"you are not of the masons."
"yes, yes," i said; "yes, yes."
"you? impossible! a mason? "
"a mason," i replied.
"a sign," he said, "a sign."
"it is this," i answered, producing from beneath the folds of my roquelaire a trowel.
"you jest," he exclaimed, recoiling a few paces. "but let us proceed to the amontillado."
"be it so," i said, replacing the tool beneath the cloak and again offering him my arm.

montresor is not a mason.

fortunato is not a mason.

fortunato does not believe that montresor is a mason.

montresor does not believe that fortunato is a mason