title: Dropdown issues clearing selection
body: <p>My dropdown is working great, it shows the needed information but when I go back to the top selection &quot;<em><strong>What would you like to learn today?</strong></em>&quot; the prior information is not cleared.
  Any thoughts on how to correct this?</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>var jsonStringProcessing =
     '[{"Question":"Where would I find information on late trips?","Answer":"By using the Late Trip Application you can see incoming mail to your facility.","Link":"https://www.usps.com"},\
       {"Question":"How many DPS errors will I have?","Answer":"Log into the application and drill down by zip 4 facility.","Link":"https://www.usps.com"},\
       {"Question":"What should I do if im missing a trip?","Answer":"Login into the ___ application and drill down by facility.","Link":"https://www.usps.com"},\
       {"Question":"What should I do if a load plan fails?","Answer":"Contact __ via the __ application","Link":"https://www.usps.com"},\
       {"Question":"Where do I report late arriving trips?","Answer":"Click on the below hyper link to submit information.","Link":"https://www.usps.com"},\
       {"Question":"How can I control work hours to plan?","Answer":"By logging into IVES and entering the appropriate information you can plan and schedule employees.","Link":"https://www.usps.com"}]';
  var jsObjectProcessing = JSON.parse(jsonStringProcessing);
  
  // fill processing select list
  $.each(jsObjectProcessing, function (key, val) {
     $("#processing").append("&lt;option&gt;" + val.Question + "&lt;/option&gt;");
  });
  
  //$(document).ready(function() {
  $("#processing").change(function () {
     var selectedItem = $(this).val();
     $.each(jsObjectProcessing, function () {
        if (this.Question == selectedItem) {
           $("#listProcessing").html(
              '&lt;b&gt;Answer:&lt;/b&gt; ' +
                 this.Answer +
                 '&lt;br&gt;' +
                 '&lt;b&gt;Link:&lt;/b&gt; &lt;a href="' + this.Link + '" target="_blank"&gt;' + this.Link + '&lt;/a&gt;'
           );
        }
     });
  });</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;div class="col-6 mb-5 mx-auto"&gt;
    &lt;select class="custom-select shadow-sm" id="processing"&gt;
      &lt;option value=""&gt;What would you like to learn today?&lt;/option&gt;
  &lt;/select&gt;
        &lt;div class="mt-2"&gt;
        &lt;div id="listProcessing"&gt;
      &lt;/div&gt;
    &lt;/div&gt; 
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>