Answer :
When dealing with software like Microsoft Excel, which is commonly referred to in questions about workbooks and highlighting changes, the software might have features to track changes made to the workbook. In Excel, the feature that highlights changes to the workbook is often related to the 'Track Changes' feature.
Since the workbook was last saved: If a workbook is set to track changes, it will typically highlight changes made from the point of its last save or when the tracking was enabled. When you save the file, the changes remain marked until you accept or reject them.
Since the workbook was last opened: If the track changes feature is used differently, though uncommon, it might be set to highlight changes from the point it was last opened. However, this is less typical unless manually re-set each time.
Since the workbook was created: Highlighting all changes since creation would generally not be practical, as workbooks usually have substantial modifications. However, theoretically, tracking can cover the entire history if set up from the start and never cleared or altered.
In most typical scenarios, particularly in high school settings and general use, it's usually framed within the context of 'since the workbook was last saved'. Therefore, the best answer to the question of how far back changes will be highlighted in Excel would be 'since the workbook was last saved.'
The option that aligns with general practice for Excel and similar applications would be: Since the workbook was last saved.
