"Looking at past behavior is a good way to predict future behavior" is the main assumption behind which method of personnel selection?

Limited number of response alternatives are given

What will be an ideal response?

Brad and Sheila have been dating for several months. Sheila, a graduate student in psychology, is studying to be a clinical psychologist. Over the months she has become concerned that Brad may suffer from generalized anxiety disorder

Which characteristics might have raised her suspicions concerning Brad's possible disorder? a) He must "put everything in its correct place." b) He sleeps more than usual and naps every day. c) He grasps his chest each time he passes an animal. d) He seeks additional information before making even minor decisions.