In Studies of Families with One Biological Child and One

Multiple Choice

In studies of families with one biological child and one adopted child, the results concluded that

A) the biological child had an IQ similar to the mother's IQ, but the adopted child did not.
B) the adopted child's IQ was almost identical to his/her biological mother's IQ, although reared away from her.
C) both the biological and adopted child had IQs similar to the mother that was rearing them.
D) the adopted child's IQ was always significantly below the IQ of both his/her adopted mother and adopted sibling.