How Do Time-Lag Comparisons Work

Multiple Choice

How do time-lag comparisons work?

A) by assigning members of different cohorts to groups based on specific characteristics
B) by comparing different groups of people of the same age at different points in time
C) by predicting a cohort's characteristics in the future and then comparing the prediction with the actual outcomes
D) by following a group for a short period of time and collecting as much data as possible