Compares current sales to last year and returns the difference, although it sounds technically credible, it does not align with how DAX functions propagate context in this scenario.

A calculation pattern that is useful for measures in general but does not satisfy the specific context transition requirement here

Evaluates Total Sales but modifies the filter context to show the same period from last year

Calculates the sum of sales and prior year sales together, although it sounds technically credible, it does not align with how DAX functions propagate context in this scenario.

Creates a new column with prior year values, however, this wording confuses row context, filter context, or evaluation timing and therefore misses the exact DAX behavior being tested.