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

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

(A) That identical twins are more similar in IQ than fraternal twins

(B) That there is more than a chance similarity between adopted children in their biological parents

(C) That siblings reared together are more similar in IQ than siblings reared apart

(D) That identical twins reared apart are more similar in IQ than siblings reared together