Why is the Blk Dot Menu considered an "overflow" pattern?

Why is the Blk Dot Menu considered an "overflow" pattern?

• A. It consolidates more actions into the menu to expose more options.
• B. It consolidates less-used or secondary actions to avoid clutter and keep primary actions prominent.
• C. It expands the main actions into a broader panel.
• D. It is used to display primary actions prominently.

Answer: (B)