Which sentence best expresses the main claim of this paragraph?

“he should not have kept playing after getting hit. subsequent impacts after even minor head trauma can cause serious brain injuries that lead to dementia, memory loss, personality disorders, and other issues later in life. so letting the brain recover after a shock is extremely important. don’t ‘just play through it.’ “

a it is advised to take time out of the game to recover after being hit in the head.

b dementia is a possible side effect of brain injuries incurred while playing sports.

c memory loss will certainly occur after one hit to the head.

d all athletes should continue to play in the game after a head injury.