Which sentence expresses the central idea of the text?

A. A Teenagers are at greater risk of certain negative effects of concussions due to the state of their developing brain.


B.Children and adults are safe from the negative effects of concussions due to their brains' stage of development.


C.While teenagers are more vulnerable to concussions, they are able to recover from the damage more quickly than adults or children.


D.No matter how much time has passed since an athlete has received a
concussion, they will continue to experience difficulty with mental tasks.