You Are Interested in Looking at the Heritability of a Variety

You are interested in looking at the heritability of a variety of personality traits. The best research method for you to use would be to study

A) adopted children who were not twins
B) both identical and fraternal twins who were raised in the same environment
C) both identical and fraternal twins who were separated early in life and raised in different environments
D) fraternal twins only who were brought up together
E) identical twins only who were separated much later in life and raised in different environments