Which of the following is strong evidence for a genetic contribution to a behavior?

Which of the following is strong evidence for a genetic contribution to a behavior
A ) Dizygotic twins have a higher concordance rate than do monozygotic twins.
B ) Monozygotic twins have a higher concordance rate than do dizygotic twins.
C ) Heterozygotic twins have a lower concordance rate than do monozygotic twins
D ) Adopted children resemble their adopted families with regard to a trait.
E ) None of the above are correct.