41. What is the main finding of the study discussed in the passage?
(A) Sitting for long periods always leads to dementia.
(B) All sedentary activities have the same effect on brain health.
(C) Physical activity has no impact on dementia risk.
(D) Mentally passive activities increase dementia risk, while active ones may reduce it.

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統計: A(1), B(0), C(0), D(5), E(0) #3915442

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