Adoption Studies Reveal That

Multiple Choice

Adoption studies reveal that

A) adopted children show a significant decline in IQ across middle childhood and adolescence,regardless of rearing conditions.
B) children of low-IQ biological mothers do as well as children with high-IQ biological mothers when placed in similar adoptive homes.
C) genetic factors play a much greater role in IQ than environmental factors.
D) when children of low-IQ mothers are adopted by parents who are above average in income and education,they score above average in IQ.