Evidence indicating that upbringing affects one’s mental ability is provided by which of the following findings? A. Identical twins are more similar in IQ than fraternal twins. B. There is more than a...

Evidence indicating that upbringing affects one’s mental ability is provided by which of the following findings?

A. Identical twins are more similar in IQ than fraternal twins.

B. There is more than a chance similarity between adopted children and their biological parents.

C. Siblings reared together are more similar in IQ than siblings reared apart.

D. Identical twins reared apart are more similar in IQ than siblings reared together.