Users report that a form is not working. What is the culprit?

  <form action="/choices" disabled>
    <fieldset disabled>
      <legend>Choices</legends>
      <label>Choice 1 <input type="radio" name="choice" value="choice1" /></label>
      <label>Choice 2 <input type="radio" name="choice" value="choice2" /></label>
      <label>Choice 3 <input type="radio" name="choice" value="choice3" /></label>
      <label>Choice 4 <input type="radio" name="choice" value="choice4" /></label>
      <button>Choose!</button>
    </fieldset>
  </form>