Review the Information from Four Abstracts Below and Identify Which

Review the information from four abstracts below and identify which study is an example of outcome-based research.

A) This study used a school-based community sample (N = 920) to examine trajectories of depressive symptoms, self-esteem, and expressed anger in the critical years of emerging adulthood (ages 18-25) .
B) To identify reasons for lower organ donation rates by Blacks, knowledge and attitudes about brain death, donation, and transplantation and trust in the health care system were examined.
C) An exploratory study was undertaken with a racially diverse group of custodial grandfathers to fill a gap in the literature about the vulnerability for elder abuse, exploitation, and neglect as expressed by older Black, Latino, and White custodial grandfathers.
D) A multicentre, international clinical trial was conducted in 3,500 patients with documented coronary heart disease to determine whether a brief education and counseling intervention delivered by a nurse can reduce prehospital delay in the face of symptoms of ACS.