Suppose That a Researcher Reports That He or She Has

Suppose that a researcher reports that he or she has evidence for nonshared environmental influences on a personality trait.What data would he or she have to provide to rule out the influence of individual differences in genotype?

A) Identical twins reared together displayed differences that can be attributed only to environmental influences.
B) Fraternal twins differed and had experienced different environments.
C) Siblings differed and had experienced different environments.
D) Identical twins reared apart did not differ in personality despite environmental differences.