Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case.
Just before the doors of the elevator close, Lola, a coworker you despise, enters the elevator. You immediately leave, mumbling about having forgotten something. Your behavior results in
(A) positive reinforcement.
(B) a secondary reinforcer.
(C) punishment.
(D) negative reinforcement.
(E) omission training.