Which of the Following Is the Clearest Example of a Cohort

Multiple Choice

Which of the following is the clearest example of a cohort effect?​

A) Most young adults have better computer skills than their grandparents.
B) ​Most young adults play vigorous sports more often than their grandparents.
C) ​Most young adults have better short-term memory than their grandparents.
D) ​Most young adults like to stay up later at night than their grandparents do.