The Study by Wilson, Laser and Stone (1982) in Which

The study by Wilson, Laser and Stone (1982) in which participants kept track of their moods over the course of 5 weeks showed that:

A) Participants were very accurate at determining what caused their moods.
B) Participants were able to determine what caused their positive moods, but not their negative moods.
C) Participants were able to determine what caused their negative moods, but not their positive moods.
D) Participants were not very accurate at determining what caused their moods.