Scarr and Weinberg's Research on Social Class and IQ Showed

Scarr and Weinberg's research on social class and IQ showed that

A) children from disadvantaged homes could raise their IQs if adopted into middle-class homes with intelligent adoptive parents.
B) children from disadvantaged homes continue to show significant deficits in IQ even after being adopted into middle-class homes with intelligent adoptive parents.
C) children from poor economic conditions do not differ significantly in IQ from children from average or above average economic conditions.
D) improving the economic conditions of the home has no significant impact on children's IQs because IQ is so strongly affected by genes.