Proof That the Environment Is Very Important in Child Development

Proof that the environment is very important in child development can be found in studies showing that

A) adoptive children are more similar to their birth than adoptive parents.
B) even identical twins are not always similar on many dimensions.
C) brothers are more different than are sisters among themselves.
D) fraternal twins are not as similar as identical twins.
E) children are often very different from their parents.