When 4-Year Olds Who Lived Their First Year in an Orphanage

When 4-year olds who lived their first year in an orphanage before being adopted were compared with 4-year-olds who had been raised at home:

A) the adopted children were less socially responsive
B) their level of oxytocin did not increase when interacting physically with their adopted mothers
C) their level of vasopressin was lower than the home-reared children
D) all of the above