Mary is worried because dementia is common in her family. she does not want to get that disease. what can she do to decrease her risk?
a) watch fitness videos to learn new technique
b) eat balanced meals without excercise
c) preform at least moderate intensity excercise regularly
d) preform low intensity excercise each week

In order for Mary to reduce the risk of dementia, then she can perform at least moderate intensity exercise regularly.

In conclusion, to decrease the risk of dementia, Mary should at least moderate intensity excercise regularly.

The correct option is C.

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answer(b) keep oxygenated and deoxygenated blood separate;