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. a. montresor is not a mason. b. fortunato is not a mason. c. fortunato does not believe that montresor is a mason. d. montresor does not believe that fortunato is a mason.