• Quantity
• Dependent selection
• Profile field
• Auto-filter

The correct answer is: Quantity

Explanation: The quantity setting of a dynamic profile is used to indicate the number of rows pulled from the feed on impression. A typical use case for setting the quantity > 1 is when you have a product feed. You may want to select 3 rows from your product feed to populate a product carousel in your ad. In order to do this, you would set the quantity field to 3.

Read more here: https://support.google.com/richmedia/answer/6072597