Misty did an experiment in which half of her subjects were told that they had extrasensory ...

Misty did an experiment in which half of her subjects were told that they had extrasensory perception and half were not. In reality, there was no difference. Interestingly, at the end of the three-month experiment, those subjects who were told that they had extrasensory perception actually outscored the control group on the ability to accurately describe video scenes with the sound turned off. This example reflects
 
  a. the Hawthorne effect.
  b. demoralization.
  c. the Pygmalion effect.
  d. selection biases.
  e. the psychological effect