Addie and evelyn, two 65-year-olds, were college students in the free-spirited, politically engaged, and open-minded atmosphere prevalent in the 1960s. they share a particular curiosity about the world and remain active in local organizations committed to women’s causes. researchers may explain the women’s sharp, sustained cognitive abilities by citing

Researchers may explain the women’s sharp, sustained cognitive abilities by citing the cohort effects.

Explanation:

Cohort effects is about a group that shares common historical or social experiences, like in the example, they share a share a particular curiosity about the world and remain active in local organizations committed to women’s causes; and are both the same age and the most commonly studied cohorts are age-related .

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.