The Best Reason to Be Cautious About Attributing All the Personality

Multiple Choice

The best reason to be cautious about attributing all the personality similarities of separated twins to genetic factors is that

A) home environments have less impact on personality than does peer influence.
B) adoption agencies tend to place separated twins in similar homes.
C) some twins develop from a single fertilized egg that splits in two.
D) adopted children's personalities are highly similar to those of their adoptive parents.