Buck's owner(s) after perrault and francois is (are)… a. hal, mercedes, and charles. c. the man in the red sweater. b. john thornton. d. the scotch half-breed who delivers mail.

The answer is actually letter d. the Scotch half-breed who delivers mail.

Explanation:

The characters mentioned in the question belong to Jack London's novel "The Call of the Wild". Buck is a dog that lives comfortably on a California ranch until he is stolen. Buck is then sold to Perrault and François - two mailmen who deliver dispatches to outposts throughout the frozen North - to become a sled-dog. After their final run, they sell Buck to the Scotch half-breed, who also works the mail and constantly overworks the dogs. It is while belonging to him that Buck finally becomes the lead dog of the team.

i cannot see any of the options        

in the line from the end of the story "the cask of the amontillado," by edgar allan poe, the narrator has put the last stone on the wall, thus sentencing fortunato to death. just like that montresor associates his feeling of sickness to the humidity of the catacombs, and seems to be glad he has taken revenge on fortunato. however, montresor's last words are "in pace requiescat," which mean "may he rest in peace." as a result, it can be inferred that he hides or does not want to assume his guilt or remorse for killing fortunato in such a horrible way.