For Impoverished Children Adopted into Middle-Class Homes,their IQ Scores Were

For impoverished children adopted into middle-class homes,their IQ scores were:

A) Correlated more with the educational level of their adoptive parents than biological parents
B) Not at all related to the educational level of their adoptive parents
C) Increasingly correlated over time with the educational level of their biological parents
D) Not at all related to the IQ scores of their biological parents