I've felt something like this before, So I'm guessing it's D?
Memoir is a personal legacy written so we can call it a historical source but not document. It is not an evidence, a report or not even a record. It is more like an autobiography or a biography from memorial times. It is a legacy written by a person for a person.
A. The mystery around the monkey's paw is introduced
Hints of this lie in the adjectives such as "curiously" and the mention of "magic" which tells the reader that there might be something more to monkey's paw, and that maybe we should be curious.
