I guess it depends. I think it's false, because that seems too long for a sentence.
Answer:
but much research has been done and more has learned about brain injuries in the last 5 years
Explanation:
because this shows they are telling more players about the injuries and informing them about the dangers of playing
Your correct on everything
Explanation:
Like what? Insert full picture. And by past job it means for you not for us as it would differ for every person or individual.
