After the Dictatorship Ended in Slobonia, Many Children Were Found

Multiple Choice

After the dictatorship ended in Slobonia, many children were found in state-run orphanages where they had been badly treated and often neglected. These children were placed for adoption and researchers followed their progress over a number of years, measuring psychological and physical indicators of well-being. This type of research is called:

A) a correlational study.
B) a natural experiment.
C) a comparative psychology experiment.
D) a pseudoscientific research.