Automatically Answer a Drill Down Question With Only One Choice

Without understanding the full setup but perhaps you can make the "treatment status" a separate row from the others, put a display logic on it depending on the choices made in the drop downs and then have a default value set on it so it's checked when it appears?
As a person with absolutely no skills in JavaScript I need to find alternatives, haha.

Have a great day!
-Mattias

Hi, if you still need, the below JavaScript will automatically select the only option of the 4th drilldown row when a selection is made in the 3rd drilldown row:

var qid = this.questionId;
var sel3 = document.getElementById('QR~'+qid+'~3');
var sel4 = document.getElementById('QR~'+qid+'~4');

jQuery(sel3).on('change', function() {
  sel4.options[1].selected = true;
});