Suppose That a Researcher Reports That He or She Has

Multiple Choice

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