In Plomin's Study of the Effects of Heredity on Intelligence

Multiple Choice

In Plomin's study of the effects of heredity on intelligence

A) adopted children's intelligence was more similar to their adoptive parents' skills and they became more similar as the children grew older.
B) adopted children's intelligence was more similar to their biological parents' skills, but they became less similar as the children grew older.
C) adopted children's intelligence was more similar to their adoptive parents' skills, but they became less similar as the children grew older.
D) adopted children's intelligence was more similar to their biological parents' skills and they became more similar as the children grew older.