Which of the following statements about heredity and intelligence is TRUE?
A. Similarities in intelligence between identical twins who were separated at birth and raised in different houses must be due to heredity.
B. Differences in intelligence between identical twins must be due to differences in their environments.
C. If identical twins are separated at birth and raised in different homes, yet still have similar intelligence scores, the similarity in their scores must be due to hereditary influences.
D. Prenatal influences have little, if any, influence on intelligence and need not be taken into account when studying environmental influences.
Answer: B
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