Which condition can you define for a drill link in a worksheet?

A drill link in a worksheet is a feature that allows users to navigate to a more detailed view of data based on specific criteria. The correct choice indicates that you can define conditions under which the drill link will be displayed. This allows for flexible data exploration and ensures that users only engage with relevant information based on predefined site or date conditions.

Setting specific site or date conditions helps in organizing data presentation effectively. It allows for targeted analysis, enabling users to view data that is pertinent to certain contexts or periods rather than displaying all possible links at all times. This targeted approach can enhance decision-making by focusing only on the data necessary for particular inquiries or reports.

The other choices do not accurately capture the flexibility and context-specific nature of how drill links can operate within a worksheet. While drill links can indeed be set to be always available or restricted in availability, the emphasis on condition-based display in the correct answer highlights the dynamic nature of data interaction in a workbook environment.