Which of the following describes slavery's role in the southern economy? select the best answer. a. slavery was forbidden. b. slavery was expensive. c. slavery was a luxury. d. slavery was profitable.

Atherapist at a free university clinic treats elementary school children with behavior problems who are referred by a social service agency. she is also a doctoral candidate who proposes using data she has and will collect about the children for a case-based research project. describe the type of parental permission which is required in this case?