b. Fortunato has never been found.
The key sentence for the answer is "For half of a century no mortal has disturbed them." Half a century is fifty years. We know that Montressor built the wall that night and walled in Fortunato. This eliminates A. Also, C is just wrong since he entombed Fortunato, not the old bones. Option D is also wrong since Fortunato is dead - he's not sleeping. The statement "no mortal has disturbed them" best indicates that Fortunato has never been found.
The dust bowl was long ago search it up and you will find all about it
The answer is "dr." the word "doctor" should be capitalized when used before a name who takes that profession. Otherwise, as a noun, lowercase is appropriate.
1) deceit
2) livelihood
3) deprived
4) misfortune
5) gratitude