Which of the following is the most credible source for an essay on the causes, effects, and risks of concussions in sports?
0An inquiry made to a popular consumer medical reference website on football and concussions.
O An interview with a sports celebrity whose personal cause is to reduce sports-related concussions.
0An interview with a high-school football coach who reviews his school's concussion protocol.
0An article analyzing research studies on sports-related concussions from an athletic training profession peer-reviewed
journal.
