Question

one study finds that the average number of head impacts among nine to 12-year-olds is 378 per season. why did the author most likely include the sentence? to support the argument that the official count of concussions is most likely inaccurate to advocate for stronger training for coaches in risk reduction for head injuries to support the argument that practice leads to a greater amount of concussions than games to persuade parents to prevent their children from playing football

Explanation:

The sentence provides a statistic about head impacts in 9 - 12 year - olds. If the argument is about practice leading to more concussions than games, this statistic about the number of head impacts (which could be from practice and games) can support the idea that practice (with its own set of head impacts) contributes to a greater total, including concussions. The other options: A - there's no info about official concussion count accuracy; B - the statistic doesn't relate to coach training; D - the statistic alone isn't enough to persuade parents to stop kids from playing football.

Answer:

To support the argument that practice leads to a greater amount of concussions than games