Which of the following statements is true about cohort analysis?
A) A cohort is a group of respondents who experience the same event within the same time interval.
B) It is unlikely that any of the individuals studied at time one will also be in the sample at time two.
C) The term cohort analysis refers to any study in which there are measures of some characteristics of one or more cohorts at two or more points in time.
D) All are correct.
Answer: D