Question

this article is about paranormal research, or haunting investigations. paranormal investigators visit locations that are reported to be haunted, interview people with ties to the location, and use special equipment that is supposed to pick up paranormal signals. they may also use a psychic, a person who is supposed to have a special connection with the supernatural.
which detail should be added to the summary?
○ paranormal investigators may also use humans to help them determine whether a ghost is present.
○ while the existence of ghosts has not been scientifically verified, paranormal investigators hope to use science to verify their existence.
○ some people wonder how to determine whether a certain place is haunted.
○ most paranormal investigators begin by researching the history of the location.

Explanation:

The original text says paranormal investigators may use a psychic (a human with a supposed supernatural connection) to help. The first option, "Paranormal investigators may also use humans to help them determine whether a ghost is present," aligns with this as a psychic is a human helper. The other options introduce new info not in the original (scientific verification, people's wonder, researching location history) so they don't fit as a detail to add to the summary.

Answer:

A. Paranormal investigators may also use humans to help them determine whether a ghost is present.