Which of the following is true about the benefits of exercise?
A) Exercise has long-term, but not short-term effects on cognition.
B) Exercise has short-term, but not long-term effects on cognition.
C) Exercising has physical effects on the body, but does not affect cognition.
D) Exercising can slow the memory declines associated with Alzheimer's disease.
Answer: D
Rationale: Exercise has both short- and long-term effects on cognition and memory. Researchers have found that older people who are at genetic risk for developing Alzheimer's disease and who show cognitive impairments can slow the rate of memory decline by exercising.
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