Studies of Adopted Children Have Shown That Adoptees Often Display

Studies of adopted children have shown that adoptees often display higher rates of learning difficulties and emotional problems when compared to their peers who are raised by their biological parents.According to the textbook, what is one reason for this?

A) Adoptive parents tend to be older and are less likely to be responsive to the needs of the adopted child.
B) Most adoptive parents fail to develop strong emotional ties to their adopted children.
C) Adoptive parents have smaller families and are more likely to be demanding and controlling in their parenting style.
D) Adopted children are more likely to have special needs or other pre-existing conditions.