The results of adoption studies have suggested that:
A) the environment has no effect on intelligence
B) lower-class children adopted by higher-class families were more likely to drop out of school
C) genetic factors, rather than environmental factors, contribute more to intelligence
D) intelligence can be improved by improving environmental factors

Question

Quizplus · Accepted Answer

Adoption studies have shown that children adopted into more enriched environments tend to have higher IQs, suggesting that environmental factors can positively influence intelligence.

The Results of Adoption Studies Have Suggested That