In MS-Excel 365, the _____________ between two columns is an indicator that we have hidden a column.

Correct option is D

A double line between two columns in MS-Excel 365 indicates a hidden column. This visual marker helps users identify hidden columns, allowing them to locate and unhide data when necessary. It enhances data management by letting users toggle column visibility without permanently deleting or losing information.
Important Key Points:
1. Double Line Indicator: The double line shows the presence of a hidden column, making it easy for users to detect hidden data in the worksheet.
2. Data Management: Hidden columns are useful for organizing complex datasets, allowing specific columns to be temporarily concealed without removing them.
3. Visibility Control: This feature gives users control over data visibility, streamlining data presentation and focusing on specific sections without losing valuable information.
Knowledge Booster:
· Single Arrow: Generally appears when resizing rows and columns, giving users the ability to adjust dimensions without affecting content visibility.
· Single Line: Separates each visible column by default, with no indication of hidden columns.
· Double Arrow: Typically seen when adjusting row or column widths by dragging, helping with spreadsheet customization but not related to hidden columns.