Betty walks three times a week and goes to a water aerobics class on Saturdays at her community pool. Her
friend Helen prefers to watch soap operas and play bridge. When they each had their annual doctor's exam,
Betty scored three points higher than Helen on the Mini-Mental Status Exam (MMSE). What might account for
these differences?
a. Helen does not have any children, and Betty has three.
b. Betty eats a higher fat diet than Helen.
c. Betty lives in a warmer climate than Helen.
d. Studies indicate that physical activity can increase cognitive ability
d
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