How to pre-populate Dynamic Dropdown widget?

Your answer to https://www.jotform.com/answers/1400094-Pre-populate-widget-Dynamic-Dropdowns- is wrong - it is possible to prepopulate a dynamic dropdown.

You put the characters %0A between the different levels of the hierarchy.

Working example: https://form.jotform.co/90306019190853?field1=Group%20B%0AOption%20B2%0AOption%20B2-2 

We are sorry for the confusion. Yes, it is indeed possible with the dynamic dropdown and configurable list widget to prepopulate via URL.

By the way, good job finding a solution to your requirements. Let us know if you need more help.