Which of the following statements represents bad decision making?
(a) I've already spent 3 years in the college so I can't drop out and go to work now.
(b) I've already paid for the ticket so I might as well stay to the end.
(c) I've put in so much time on this paper, I can't quit now.
(d) My stock has dropped $10 a share so I can't afford to sell it now.
(e) All of the listed choices.