Question

guiding questions
question 1 of 5
how do scientists know that many football players experience severe brain damage?
a they examined the brains of current football players.
b they interviewed the families of deceased football players.
c they found that most football players were killed with hits to the head.
d they examined donated brains of deceased football players.

Explanation:

Research on chronic traumatic encephalopathy (CTE) in football players relies heavily on post-mortem analysis of donated brains from deceased players, as this allows for direct examination of brain tissue for signs of damage that cannot be fully detected in living people. Option A is incorrect because invasive brain examination of living players is not standard. Option B is incorrect because family interviews cannot confirm physical brain damage. Option C is incorrect because most football players are not killed by head hits, and this does not confirm brain damage in living or deceased players.

Answer:

D. They examined donated brains of deceased football players.