What action opens a folder to access its contents?

• A. File Extension
• B. Enhanced Screen Tip
• C. Expand a folder
• D. Adjacent Files

Answer: (C)

Expanding a folder is the action that reveals what’s inside. When a folder is collapsed, its contents are hidden; expanding it toggles that state so you can see and access the files and subfolders it contains. In most interfaces you expand by clicking a disclosure triangle or similar control, or by double-clicking the folder to open it. The other options don’t relate to revealing contents: a file extension is a suffix that identifies a file type, an enhanced screen tip is just a tooltip, and adjacent files are simply files that happen to be near each other.