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.

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