"YOUTH FOOTBALL CHANGES NERVE FIBERS IN BRAIN"

2. PART B: Which detail from the article best supports the answer to Part A?

O A. "There is rising concern that youth football players who experience these collisions in practices and games may be vulnerable to their effects." (Paragraph 1)

OB. "The years from age 9 to 12 are very important when it comes to brain development." (Paragraph 2)

O C. "The results suggest that repetitive subconcussive head impacts associated with participation in youth contact sports could lead to changes in the shape of the corpus callosum." (Paragraph 9)

O D. "The ultimate goal of the research, Dr. Kim said, is to provide guidelines for safe football play" (Paragraph 10)​