Which of the Following Cross-Sectional Research Findings Would You Be

Multiple Choice

which of the following cross-sectional research findings would you be MOST likely to suspect a "cohort effect" as the primary explanation?

A) lower bone density among 70-year-olds than among 35-year-olds
B) faster recall of lists of words by 20-year-olds than by 60-year-olds
C) higher percentage of blue-collar workers among 50-year-olds than among 30-year-olds
D) a lower rate of marital satisfaction among couples in their 30s than among couples in their 50s