Shannon Is Five Years Old and Was Adopted at Birth

Multiple Choice

Shannon is five years old and was adopted at birth.Her adopted mother has bipolar disorder and some psychologists in the area are studying Shannon's development over time,as well as a number of other children who were adopted at birth and live with adoptive parents with bipolar disorder.Shannon is most likely in what kind of study?

A) cross-fostering
B) twin method
C) experiment
D) cross-sectional