Hey skyman ,
Not answering your specific question, but does adding the appended text into the choice and using rich text editor to format to your needs suffice? Unless you have prescribed design needs (I.e. the aesthetics of a single size button), that may also help directly tie your explicative to the choice.

I did use use the rich text editor and it does look more acceptable but the rich text is then added to the report which is undesired.
I am interested in how to use jquery and append static text to the multiple types, because adding text below breaks the mobile view.

jrc3 - Add the text to the choices then under recode modify the choice labels to remove the extra text. I believe that will address your reporting issue.

TomG while that does not address the question, I did try it and the results report did not change.

Thanks to NTTdocomo post here Form text boxes elements — Qualtrics Community
I was able to achieve my goal with the following:
Qualtrics.SurveyEngine.addOnload(function()
{
/*Place your JavaScript here to run when the page loads*/
jQuery("#"+this.questionId+" inputntype='radio']:first").after("some text here");
jQuery("#"+this.questionId+" inputntype='radio']:eq(1)").after("some text here");
jQuery("#"+this.questionId+" inputntype='radio']:eq(2)").after("some text here");
jQuery("#"+this.questionId+" inputntype='radio']:eq(3)").after("some text here");
jQuery("#"+this.questionId+" inputntype='radio']:last").after("some text here");
});