In reply to @NclNumbas
@NclNumbas This is a convenience feature that arose from writing this year's exams - quite often we had questions with several scenarios, each with multiple corresponding bits of data.
In reply to @christianp
@NclNumbas The variable generation consisted of making lists of the values for each scenario, picking a list at random, then assigning each item from the chosen list to a different variable. This change makes it possible to do all of that in one go.