Question

which sentence from this selection expresses the central idea? a cte has been found in professional boxers, football players, and hockey players. b repeated hits to the head can pose serious, long - term risks to any athletes brain. c behavioral changes and memory problems eventually plague many cte victims. d elite athletes are some of the strongest people in the world.

Explanation:

To find the central idea, we analyze each option:

• Option A lists sports where CTE is found, which is a detail, not the central idea.
• Option B states that repeated head hits pose serious long - term risks to athletes' brains. This is a broad statement that can encompass the other details (like CTE in athletes and problems faced by CTE victims).
• Option C describes problems faced by CTE victims, which is a consequence of the main issue and not the central idea itself.
• Option D is about elite athletes' strength, which is unrelated to the topic of head hits and brain risks.

Answer:

B. Repeated hits to the head can pose serious, long - term risks to any athlete's brain.