Answer:
I think that would be either a fragment or an independent clause.
Explanation:
Don't take my word for it, but I hope this helps. Good luck!
Answer: This sentence is a fragment
Explanation: fragments are sentences broken off/ not completed or picked off of 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
