How can workbook variables be applied within a worksheet?

Workbook variables can indeed specify the data displayed in column or filter expressions, which is why this choice is correct. In a worksheet, workbook variables serve as dynamic placeholders for values. When linked to column or filter expressions, they allow for a flexible and interactive way of presenting data based on user-defined inputs or conditions.

For instance, if a workbook variable is defined to hold a specific criterion, such as a date range or a category, it can then be referenced in various worksheet components. This might enable the display of data subsets that meet those criteria, thus enhancing the interactivity and functionality of the workbook. Users can alter the variable’s value, leading to automatic updates in the data displayed, which makes for a more user-friendly experience and dynamic reporting.

In contrast, using workbook variables solely for calculations would limit their functionality and undersell their potential. Identifying them only as identifiers would ignore their broader application potential. Moreover, constraining them to external data connections does not accurately reflect their versatile use within the worksheet environment.