Which sentence contains a noun which is in the incorrect form? A) "There are people who laugh at the horse that would not dare to laugh at the master," cried the young would-be musketeer. B) "I do not often laugh, sir," replied the stranger, "as you may see by the expression of my face; but nevertheless I retain the privilege of laughing when I please." C) "And I," cried d'Artagnan, "will allow no man to laugh when it displeases me!" D) And the stranger, muttering to himselves, directed his steps toward the kitchen.