Card 83 / 104: An elementary school counselor tells the third-grade teacher that a test revealed that certain children will excel during the school year. In reality, no such test was administered. Moreover, the children were unaware of the experiment. By the end of the year, all of the children who were supposed to excel did excel! This would best be explained via
A) the Hawthorne effect.
B) the Halo effect
C) the Rosenthal effect or the experimenter expectancy effect
D) observer bias.

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