What Discovery Did Skeels and Dye Make When They Administered

What discovery did Skeels and Dye make when they administered intelligence tests to a sample of orphans cared for by trained professionals in a "good" orphanage and to a second sample of orphans raised by residents of an institution for mentally retarded women?

A) The orphans raised by the mentally impaired scored an average of 25 points lower than those raised by trained professionals.
B) The orphans raised by the mentally impaired scored an average of 28 points higher than those raised by trained professionals.
C) There was no difference in the scores of the orphans raised by the mentally impaired compared to those raised by trained professionals.
D) The orphans raised by the mentally impaired scored an average of 47 points lower than those raised by trained professionals.

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