Which of the Following Behavior Genetics Research Results Provides the Best

Multiple Choice

Which of the following behavior genetics research results provides the best evidence of the importance of environmental factors in the development of a particular trait?

A) An adoption study shows that the correlation between adoptive children and their adoptive parents is higher than the correlation between the children and their biological parents.
B) An adoptive twin study shows that the correlation between identical twins who grew up together is higher than the correlation between identical twins who grew up apart.
C) A twin study shows that the correlation between identical twins is higher than the correlation between same-sex fraternal twins.
D) A family study shows that the correlation between siblings reared together is higher than the correlation between siblings reared apart.
E) All of the results provide equally good evidence of the importance of environmental factors in the development of the trait.