Which detail from the monkey paw is most clearly an example of foreshadowing

Answer: Foreshadowing is a literary device that is used by authors to predict an incident or development that happens later in the plot of the story.

In "The Monkey's Paw" by W. W. Jacobs the most clear example of foreshadowing is option A "The fakir's prediction that anyone who interferes with fate will be sorry".

The fakir's prediction comes true when Mr. White wishes for 200 pounds. The next day a representative from his son's company reaches their place to announce the death of their son, Herbert. The company pays exactly 200 pounds as compensation to the deceased's family.