Data on the heritability of intelligence indicates that when two people are very closely related,their

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Studies on the heritability of intelligence have consistently found that there is a strong correlation between the IQ scores of individuals who are closely related, such as siblings, parents and children, and twins. This indicates that genetics do play a significant role in determining intelligence, and that when two people are closely related, their intelligence test scores are much more similar than those of unrelated individuals. This is the reason B is the best choice.

Data on the Heritability of Intelligence Indicates That When Two