Ron Is Making Potato Soup

Ron is making potato soup.His roommate tastes it and tells Ron it is great,but Ron thinks it needs more salt.He adds just a little salt,and thinks the soup now tastes perfect.However,his roommate tastes it again and tells Ron that the soup is ruined because it is too salty.Apparently,for the taste of salt

A) Ron can detect a smaller just noticeable difference than his roommate.
B) Ron's roommate can detect a smaller just noticeable difference than Ron can.
C) Ron has a higher absolute threshold than his roommate does.
D) Ron has a lower absolute threshold than his roommate does.