A researcher was studying a group of elderly people to determine the role of changes in their brains with changes in cognitive ability. when the people in the study died, their brains were removed and studied. the researcher discovered that most people of the same age had similar changes in their brains. however, the people who engaged in intellectually stimulating activities like reading and writing tended have less loss of cognitive ability. evaluate which answer presents the conclusion the researcher was most likely to reach.



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