How are line items affected when a user edits the default targeting for insertion orders?

Existing line items are uneffected and new line items inherit the new default targeting
New line items inherit the new default targeting and existing line items inherit edits to default geotargeting
New and existing line items inherit the new insertion order targeting
Existing and new line items apply the original default targeting

The correct answer is:

Existing line items are uneffected and new line items inherit the new default targeting.