When Children of Low-IQ Biological Mothers Were Adopted at Birth

Multiple Choice

When children of low-IQ biological mothers were adopted at birth by parents who were well above average in income and education,they

A) showed a significant decline in IQ across middle childhood and adolescence.
B) did as well as children with high-IQ biological mothers placed in similar adoptive families.
C) scored above average in IQ during the school years.
D) scored below average in IQ during early and middle childhood.