Class QuizFeedback

// Setting feedback which should be automatically shown when a user responds to a question
// incorrectly.
var textItem = form.addTextItem().setTitle('Re-hydrating dried fruit is an example of what?');
var feedback = FormApp.createFeedback()
  .setDisplayText(
      “Good answer, but not quite right.  Please review chapter 4 before next time.”)
  .addLink("http://wikipedia.com/osmosis");
textItem.setFeedbackForIncorrect(feedback);