In Looking at the Relationship Between Heredity and IQ,which of the Following

In looking at the relationship between heredity and IQ,which of the following is the most true?

A) Fraternal twins are more likely than identical twins to have similar IQs.
B) Heredity appears to have the largest influence on childhood IQ scores and decreases with age.
C) Contradicting earlier research findings,the correlation in IQ scores between identical twins is only approximately +0.2.
D) Heredity appears to have the largest influence on adult IQ scores and this influence increases with age.

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