gistfile1.js

if (!choice.correct && choice.content.alt.text) {
          altText.text(choice.content.alt.text).show();
        } else if (choice.correct && typeof choice.content != 'undefined' && typeof choice.content.text != 'undefined' && null != choice.content.text && choice.content.text.length > 0) {
          altText.text(choice.content.text).show();
        } else {
          altText.hide();
        }

if (!choice.correct) {
  if (choice.content.alt.text) {
    altText.text(choice.content.alt.text).show();
  }
  else if (choice.content && choice.content.text && choice.content.text.length > 0) {
    altText.text(choice.content.text).show();
  } 
  else {
    altText.hide();
  }
}