Select ALL the correct answers. Which three sentences from the passage best support the claim that coaches need more training in how to respond to concussion injuries?

A. Concussions can occur after a fall or from players hitting into each other with their bodies or with equipment, such as a goalpost.

B. Studies have shown that students who participate in sports have greater self-confidence and leadership, higher grades, and more restraint in avoiding risky behavior than those who do not play sports.

C. Football players receive head injuries 45 percent more often than players in girls' soccer, which has the second highest rate of concussions.

D. Unfortunately, many coaches and athletic trainers misdiagnose players who may have concussions.

E. Research has found that long-term effects of concussions can be problems with decision-making, increased aggression, and even diseases such as dementia, Alzheimer's, and Parkinson's.

F. A 2014 study by the journal Medicine & Science in Sports & Exercise found that players who return to sports before the brain recovers from a concussion increase the likelihood of having long-term health problems.