Which individual is most likely to have an advantage in cognitive functioning into old age?

Question

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Research suggests that individuals who engage in intellectually stimulating activities throughout their lifetime, such as completing higher education and working in mentally challenging jobs, are more likely to maintain cognitive functioning into old age. Therefore, the married female who completed college and is now engaged as a personal trainer is most likely to have an advantage in cognitive functioning into old age.

Which Individual Is Most Likely to Have an Advantage in Cognitive