Which of the following explain the trend in life expectancy in america? a. multinational corporations have increased. b. health care technology has improved. c. satellites broadcast television around the world. d. more immigrants enter the country every year.

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?