(A)because it sums the answer up into a basic sentence.
Answer:
"But a subgroup of kids, about 10% or 20%, showed a dramatic onset of symptoms after their injury and persistent symptoms that in some cases remained even 12 months after the injury."
Explanation:
I read the Article and took the quiz. I really hope this help :D
Answer:
B and C
Explanation:
They're the only two options which don't repeat the phrases from the original text.
I think your answer would be (rural)
...I hope I helped
I'm sorry if I didn't